Ann Coulter gives good advice for this case:
"If the liberal you're arguing with doesn't become speechless with sputtering, impotent rage, you're not doing it right. People don't get angry when lies are told about them; they get angry when the truth is told about them. If you are not being called outrageous by liberals, you're not being outrageous enough. Start with the maximum assertion about liberals and then push the envelope, because as we know, their evil is incalculable... Nothing too extreme can be said about liberals, because it's all true." (How to talk to a liberal (if you must), 2004, p. 12)
Well, I think the real rhetorical jiu-jitsu is to brutally tell the truth even if it involves praising something the liberal managed to get right, like the proverbial blind squirrel getting an acorn.
Because you got the whole Spirit of God behind you now. Now a nasty battle may ensue, but if you are adamant you’ll win the ultimate game. Which is to even snatch that liberal out of Satan’s hands if possible.