But my question wasn't answered, is alcohol to blame for his contradictions ?
No, he is to blame for continuing to drink and not getting help to quit drinking. I'm a recovering alcoholic so I know when we get sober we learn we're responsible for everything we say and do. We have to work hard to repair for the wreckage of the past and make amends to those we have harmed. It's his decision to pick up a drink. Nobody is holding him down and pouring alcohol down his throat.
Your husband sounds like a typical active alcoholic. Will say anything to keep the enabler on hand to pick up the pieces, support them in their drinking. All alcoholics blame others for their drinking and their problems.