Just because his support for the war was specific but not enthusiastic, he is no less of a liar when he said he was always against it.
The result of which is, he was just as fooled by the faulty intelligence as everyone else who voted for the war, then changed their mind. His also being for the war removes his ability to criticize Clinton for being for the war. It is a "glass houses" kind of thing.
And again, Clinton never denied her vote,
and she would eventually apologize for it. Um, kinda. Trump flat-out lied about what he said on the record. So, regardless of their stances on the war (which, again, appear to be the same), Trump straight-up denied reality, and that's par for the course.
Oh, and the war was a resounding fucking mistake. I hope we learn something from that.