To these people, hypocrisy just doesn’t matter. An act is right if and only if the right people are doing it, and likewise an act is wrong if and only if the wrong people are doing it. The morality is determined exclusively from identity before the act is even committed. What matters to them is not how Obama was interacting with Iran, but that it was Obama who was doing it. Now that it’s Trump doing it, the justifications will flow.

Any arguments, rational or otherwise, justifying the act are theater at best or subterfuge and sabotage at worst. The purpose of the arguments isn’t to convey a thought the speaker actually believes, like a good faith argument would. The point is to get others on their side who don’t derive morality from identity by any means possible, to sow confusion and doubt into the opposing side, and to waste the opposing side’s time and resources refuting bad faith fallacies.