You should reread his posts.
Impugning someone's intellect among other put-downs is a favorite liberal condescension tactic.
Examples:
1. "You seem to be stuck on stupid? Can we do anything for you? You need the article translated into something like " phonics is fun" so that you actually understand what it all means?"
2. "how friggin childish can you be?"
Implying that your opponent in a discussion is a child is another favorite liberal condescension tactic.
Neither type of statement is worthy of a conservative discussion of an issue.