It's sad, I don't enjoy destroying them so much as I enjoy a fruitful conversation between myself and people of different opinions when we find common ground. That kind of thing makes my day.
Destroying leftist ideologues is just a necessity like taking out the trash. Distasteful, but necessary.

When arguing with someone who is entirely dishonest in their intent:

• Don't defend against their points, argue yours.

• When they inevitably try to dodge, deflect or project, don't get turned around. Nail them on a point and don't let them drop it until you get a solid response.

• Don't get tricked into their word-games where they redefine language (essentially, the "rules" of the argument) to suit them.

• Use brief, simplistic responses. The more you give them, the more they have to search through and find a hair to split. Finding a simple contradiction you know they can't suitably answer and pointing it out in a sentence or less is often a knockout punch that will leave them gobsmacked and scrambling for a way to deflect.

• Know your subject. Don't stray into unfamiliar territory, they will speak with complete conviction on things they know nothing about, if you admit even a hint of doubt (because you're being honest) they'll proclaim victory.

• Point out when they're deflecting, projecting, dodging or redirecting and again, nail them to the points and don't let them wriggle out of it.