Where does the Bible use the term tribulation to refer to God's wrath?
Christians are specifically told that they will know tribulation. And Matthew 24:21 says that believers will experience "great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be". This is NOT refering to his wrath, but to persecution by the antichrist. Clearly believers are not going to be taken out, or else Satan and his minion(s) will have no one to persecute.
When Jesus returns in the clouds 24:29ff and fathers believers living and dead (the 1st resurrection), THEN he pours out his wrath on the earth. This is not called tribulation, but rather wrath.
Believers will be beheaded during the tribulation and great tribulation, being identified because they specifically refuse to take the mark of the beast, which is the sole purpose of the mark: to identify believers so Satan can kill them.
That should read “gathers the living and the dead”, not “fathers” (a typo)