What they (Leftists) will never do, in fact can't do...is engage you fact-for-fact on their superior or proven ideas that work better. They cannot do it. So you get called names, they will mock you, crack jokes, will lie about what they truly believe or deny it, attempt to ignore you, discredit you, shut you down, or destroy you out of pure frustration.
They will NEVER, EVER, factually debate you with their better ideas because they can't. You'd be reduced to childish name calling too if that's all you had to fight with. I don't engage them in their pettiness with the name calling and insults...I try to stick to facts and because they can't debate me on the merits of their beliefs, they just "ignore" me or insist I'm crazy and not worth responding to.
When you understand how weak they are 007, it's easy to understand their losing mentality. It's like Lebron going against middle schoolers on the hoops court. He isn't worried about losing to them, it's more amusement for him than true competition.