Yes, alliances change, but for the right wing to act like working with the CIA in the 80s to support the Taliban is a BAD thing would mean that they would (if they were consistent) have to cast aspersions on their hero, Ronald Reagan.
What is scary is that he has a whole group of people who stand around him nodding at his every word, because if someone stood up and challenged him they'd get mobbed. Evangelist mob psychology creeps me out.