Irenaeus:
"And therefore, when in the end the
Church shall be suddenly caught up from this, it is said, There shall be tribulation such as has not been since the beginning, neither shall be.
Matthew 24:21 For this is the last contest of the righteous, in which, when they overcome they are crowned with incorruption." (Against Heresies, Book V, Chapter XXIX, Paragraph 1)
If I understand correctly, your claim is that the Church is the Church; but the righteous are not the Church but rather only tribulation believers.
Yet Irenaeus earlier describes the righteous as all believers, i.e. the Church:
"For whatsoever we acquired from unrighteousness when we were heathen, we are proved righteous, when we have become believers, by applying it to the Lord's advantage." (Against Heresies, Book IV Chapter XXX Paragraph 3)
"The Father, therefore, who has prepared the kingdom for the righteous, into which the Son has received those worthy of it, is He who has also prepared the furnace of fire, into which these angels commissioned by the Son of man shall send those persons who deserve it, according to God's command." (Against Heresies, Book IV Chapter XL Paragraph 2)
Furthermore, there is no instance in the remainder of Book V, after the first quotation above, in which a reference to "righteous" is restricted to only tribulation believers.
Explanation?