Trump's approval rating among his base is still overwhelmingly high. They know what they were voting for, and they still support him. They know that Trump lies like he breathes, and they are perfectly fine with that. Trump supporters themselves are largely liars. They do not openly state the positions they actually hold. That Trump says X and does Y is fine because his supporters say X and believe Y. Words are a game to them, a means to accomplish a goal rather than something to communicate honestly with.

The most important thing to understand about Trump and conservatism in general, by far, is that there is one central principle that underpines the entire ideology: hierarchy. Going back to the time of kings and nobility and clergy, through to the present day.

"Conservatism consists of exactly one proposition, to wit: There must be in-groups whom the law protects but does not bind, alongside out-groups whom the law binds but does not protect."

One set of laws for the people higher in the hierarchy, and one set of laws for the people lower in the hierarchy. Things that are okay for them to do are not okay for you to do. Wars started by Democrats are bad. Wars started by Republicans are good. They know this is not convincing rhetoric to anyone who is not part of the in-group, so they lie about their reasons and play games with words. This, however, is what they truly believe.

It is why every action they take appears hypocritical to their opponents, but in actuality, it is perfectly consistent with their values - it is good when they do it, because everything is good when they do it, and it is bad when somebody else does it, because everything is bad when somebody else does it. It is why "the only moral abortion is my abortion". It is why the exact same policies executed by different presidents will have the same approval rating by democrats, but a completely inverse approval rating by republicans (eg 40% of Democrats approve of either Obama or Trump striking Syria, while 20% of Republicans approve if Obama does it and 80% approve if Trump does it). It is the single consistent trend through all of their policies. They know exactly what they were voting for, and that is for the man who represents their hierarchy. The games he plays with words are part of the platform.

Edit: I have rewrote the message quite a bit, apologies if anything doesn't make sense.

Iranians describe scenes of catastrophe after Tehran's oil depots bombed