Enter the "man of lawlessness." This group will be infiltrating God's people similar to the group that infiltrated first century Christians after the death of the apostles.
That is not the case, and it is clear that you are not concern with what the Scriptures actually state. The MOL is said to be in God's temple exalting himself and the KOTN/DT is said to be in the holy place exalting himself. The MOL comes to his end by Jesus and so does the KOTN. You can't have two entities in the temple/holy place at the same time both said to be exalting themselves above the other.
Connected with the apostasy/LIE from the MOL is judgment. It says those that believe the LIE/apostasy will perish/not be saved. It says of those they believe the LIE was because they did not love the truth.
Connected with the beast (who also comes to his end when Jesus comes) is the mark which is a judgment to those that take it/support the beast will get God's wrath (perish/not be saved).
In regard to the KOTN as you pointed out verse 35 mentions doing a refining/cleansing/whitening. That is because that is the GT/42-months and during such time is when what will be the great crowd, that is when they wash their robes in the blood of the Lamb.
Hour of judgment. Within the context and general scheme of things, this final warning would be given, therefore must be referring to Armageddon.
1 Pet. 4:17 Not sure of this one. Let me think about it.
The "hour of judgement' or 'hour of test' is a symbolic 'hour' and is referring to the GT/42-months. The test is as to whether you take the mark/support Satan's beast/8th king/kingdom, or if you refuse the mark in support of God's kingdom allowing yourself to be killed/captive during the 42-months. That is when the holy city/place/temple is said to be trampled. That time is the judgment that starts with the house of God.