Clearly some of the prophets in the OT and indeed the two witnesses in Jerusalem have a broader role than simply an internalised affirmation of the church. So I would take this verse in the context of the whole of scripture.
Jonah was called to prophesy to sinful Assyrians who did not know God, The two witnesses will challenge an angry world with an affirmation of the Coming King and Kingdom of God. Agabus warned of a famine that would touch not only Christians but others also.
Speaking of the two witnesses, we must study deeply Revelation 11: It seems from the text of Revelation 11, that the temple had not yet been occupied by the false messiah, the Beast like a lamb (Rev.13:v.11) , claiming to be God (2Thes.2:1-17), because FIRSTLY THE COURT WHICH IS WITHOUT THE TEMPLE IS GIVEN TO THE GENTILES.
Revelation 11:v.2-3:
2 But the court which is WITHOUT the temple leave out, and measure it not; for it is given unto the Gentiles: and the holy city shall they tread under foot forty and two months. - 1.260 days, 3 And I will give power unto my two witnesses ...
What will be the scenarios of Jerusalem when the MAN of sin manifest himself in this time? It will be very soon, by the way.
THE FIRST SCENARIO THAT WILL BE SEEN IN JERUSALEM
In fact the false messiah will manifest himself in the holy city in short future. The supposed messiah, called Eliyahu, born in Jerusalem, already living in the holy city for decades (this detail is very important to be known to everyone here of course), this MAN as soon as he manifest himself as a messiah in the days to come, he will begin to make signs and lying wonders. This esoteric / spiritist / kabbalistic messiah of the Jews will do great signs and wonders, even will make fire come down from heaven on the earth in the sight of men, deceiving them that dwell on the earth by the miracles which he has power to do.
THEN A SECOND SCENARIO WILL BE SEEN IN JERUSALEM
All kind of comunications, the midea in general, will comment the signs and lying wonders of the false messiah and will show them to the whole world, mainly the chanels of television. In the other hand, Ministries and Ministers of all denominations and sects, and all religious leaders of all religious system that exist, they will preach and spread at the four corners of the earth saying Christ is in Jerusalem. Then the whole world will hear by/through the leaders of the evangelical Churches and non evengelic too, that he is the Christ or messiah.
AFTER THAT, A THIRD SCENARIO WILL TAKE PLACE IN JERUSALEM
The third scenario in Jerusalem, the holy city, will be of human upheaval, the environment in the holy city will be of extreme convulsion, multitudes of people and kindreds and tongues and nations will travel to Jerusalem, a strong tourist movements from all nations, mainly religious tourism from all religions and evangelical churches of all denominations and sects will travel to Jerusalem, multitudes will be circling in holy city. Even the Pope will meet the false messiah in the midst of a great human mass of religious people, a strong religious movements towards Jerusalem.
These will be the scenarios in Jerusalem during 42 months as soon as manifest the false messiah in Israel, enthroned in Jerusalem, which spiritually is called Sodom and Egypt. Thus will fulfil literally what is written in Revelation 11 and 13
A FOURTH AND TERRIBLE SCENARIO TAKE PLACE, A SCENARIO OF WAR
Rev.11:v.2 - the court which is without the temple leave out...it is given unto the Gentiles: and the holy city shall they tread under foot forty and two months.
See, in paralel with the scenarios above, the true Christians will preach against these satanic movements, the environment on the earth will be a spiritual and religious War and one of the seven heads of the Beast of sea -the Papacy and the woman which rides upon him - will be wounded to death.
Then the false messiah will make a deal with the Pope to build an universal religious Empire (iron mixed with clay), and he will give to the Pope his Power, and his Throne and great Authority (Rev.13:v.2, then the deadly wound of the Papacy will be healed and all the World will be wondered after the Pope, called or nicknamed Paulus VII, seated on the throne of the false messiah in the holy city.
And the peoples of the earth included the Jewish people guided by the false messiah, called Eliyahu, they will worship their false messiah which gave power unto the Pope, and also they will worship the Pope, saying, Who is like unto the Pope? who is able to make war with him? Then, face to the environment extremely favorable, the pseudo messiah will make a deal with the Pope to build an universal Empire, a religious Empire, atually an anti-JESUS Empire or AntiChrist's Empire, and according Scriptures who will the FIRST to rule this satanic Empire for 42 months will be the Pope, as it is prophesied in Revelation 13:v.5. (Pope Paulus VII)
Then will be given unto the Pope a mouth speaking great things and blasphemies; and also will be given power unto him to continue with his blasphemy for forty and two months (Rev.13:v.5) and he will open his mouth in blasphemy against God, to blaspheme his name-JESUS-, and his tabernacle, and them that dwell in heavenly places in Christ (Eph.1:v.3).
And will be given unto the Pope Paulus VII to make WAR with the saints (Dan.7:v.22&25-27), and to overcome them: and power will be given him over all kindreds, and tongues, and nations, all that dwell upon the earth will worship him, those whose names are not written in the book of life of the Lamb that was slain from the foundation of the world.
Rev. 13:v.9-10 say: 9 If any man have an ear, let him hear. 10 He that leadeth into captivity shall go into captivity: he that killeth with the sword must be killed with the sword. Here is the PATIENCE AND THE FAITH OF THE SAINTS.
THE WORST OF ALL WILL COME AND IT IS AT DOOR
But the worst of all, as soon as ends the FIRST period of 42 months of the Antichrist's Empire, ruled by the Pope Paulus VII, afterwards will assume the RUTHLESS false messiah, and he will rule the Antichrist's Empire for 1.290 days (Dan.12:v.11), then will be established the Abomination of Desolation, the end of the Dispensation is arrived, yeah, this will be the worst of all precedent things as they are described in Revelation 13:v.11-18, but this is for another chapter and a new post.
Among the evangelical people of all denominations will be divisions, they will be hated of all nations for JESUS name's sake, among the believers many will be offended and will betray one another, and will hate one another. And many false prophets shall rise in the churches and will deceive many. And because iniquity shall abound, the love of many shall wax cold. But he that shall endure unto the end, the same shall be saved.
Blessed is he that waiteth, and cometh to the thousand three hundred and five and thirty days. Dan; 12:v.12 In my vision, the day 1,335 is the day of JESUS's coming.
Nevertheless when the Son of man cometh, shall he find faith on the earth?
In Christ JESUS, KING of kings (kings made by Him), and LORD of lords
God bless