I don't think the thread makes any sense with a non-literal interpretation of "everything."
Trump lies about some things? Okay, I can see that. But then you have a thread asking, "why does Trump lie about some things?"
Which, okay, valid question. But you'd have to look at the specific things you think he's lying about, and answer the question on a case by case basis. He lies about this thing for this reason. He lies about that thing for that reason. Etc.
And that's not the way the people answering the question seem to be interpreting it. All the answers are blanket answers for a blanket scenario.
So I think the question that was asked, and the answers given, are all based on a literal use of "everything".