On a practical note people can take to the street, hand out leaflets, engage the public and raise awareness of the very real threat of Isis....but the apathy from fellow Christians in the UK is astonishing....we get more Jewish people standing with us against the persecution of Christians and minority groups in Syria and Iraq, than we do from the Churches.
As for just allowing these savages to continue their blood-fest unchallenged...that is utterly unacceptable...in fact all people are obligated to stand up against this evil and defend their lands and their people. The passages from Hebrews, 1 Peter and Revelations are not to do with war but with what happens to Christians who are in the power of the enemy and can do nothings about it....much of what they suffered being at the hands of the Romans and their own people and from a direct result of being a witness or preaching the Gospel.
When the L-rd returns, He will be the Lion of Judea and many many people are going to be slaughtered.
Rev 19:
11 And I saw heaven opened, and behold, a white horse, and He who sat on it
is called Faithful and True, and in righteousness He judges and wages war.
12His eyes
are a flame of fire, and on His head
are many diadems; and He has a name written
on Him which no one knows except Himself.
13He is clothed with a robe dipped in blood, and His name is called The Word of God.
14And the armies which are in heaven, clothed in fine linen, white
and clean, were following Him on white horses.
15From His mouth comes a sharp sword, so that with it He may strike down the nations, and He will rule them with a rod of iron; and He treads the wine press of the fierce wrath of God, the Almighty.
16And on His robe and on His thigh He has a name written, “KING OF KINGS, AND LORD OF LORDS.”
17Then I saw an angel standing in the sun, and he cried out with a loud voice, saying to all the birds which fly in midheaven, “Come, assemble for the great supper of God,
18so that you may eat the flesh of kings and the flesh of commanders and the flesh of mighty men and the flesh of horses and of those who sit on them and the flesh of all men, both free men and slaves, and small and great.”
19And I saw the beast and the kings of the earth and their armies assembled to make war against Him who sat on the horse and against His army.
Doom of the Beast and False Prophet
20And the beast was seized, and with him the false prophet who performed the signs in his presence, by which he deceived those who had received the mark of the beast and those who worshiped his image; these two were thrown alive into the lake of fire which burns with brimstone.
21And the rest were killed with the sword which came from the mouth of Him who sat on the horse, and all the birds were filled with their flesh.