You're misunderstanding me. It's not that you accused them of being communists while drunk. The point is you chose communist as the term of derision. (And communists are indeed worthy of derision.)
If you didn't have a negative opinion of communists then you wouldn't have chosen that term.
That is beside the point.
I did not truly believe they were communists, when I was sober.
In other words, I just said a whole bunch of stupid crap that I didn't really believe because I was drunk.
That's just one example of hundreds. It's one of the few I remember. :)