Wouldn’t I believe what?
Did you read my post? I was saying that perhaps Trump is moving military forces to the border in order to stop the caravan, because he obviously doesn’t like it.
That suggests that such a caravan exists. And it also suggests that he isn’t doing it just to do it whether or not he believes it.
You give Trump too much credit by suggesting he has rational reasons for doing the things he does and/or that his reasoning is genuine.