The confusion brought on by passages like these thought to have been written by one of Paul's followers according to many scholars, is the exact reason why you should study what a professor teaches, so that you can place this in the proper context.
That's not a question, it is questions. I find them both questionable that you even asked such when you should factually know the proper answers.
What are your real motives here?
Here is the passage OP is placing in question.
2Th 2:11 And for this cause God shall send them strong delusion, that they should believe a lie:
Second Epistle to the Thessalonians - Wikipedia, the free encyclopedia
"The best understanding of 2 Thessalonians ... is to see it as a deliberate imitation of 1 Thessalonians, updating the apostle's thought.".