You must be incredibly stupid.
Beyond not agreeing with your politics, what reason do you have that the person you are calling stupid is actually stupid? The problem with name calling is it often takes away from an actual point. The world should not be my team vs your team or someone is stupid because they disagree with me. That sort of thinking does no one any favors especially the person who thinks that way.
No doubt, calling someone stupid who is actually stupid like Milo, for example, is a reasonably defendable claim.