One of leftist credos is that their ability to find the right song to argue with is evidence they are correct.The venerable Tom Lehrer, despite being a liberal, had some pretty funny songs back in the day. One that comes to mind in this context is "The Folk Song Army." Here's one of the lines from the song:
Remember the War Against Franco,
That's the kind where each of us belongs.
Though he may have won all the battles,
We had all the good songs!
I think it was one of Peter, Paul, & Mary who said something to the effect of: "Let the other side have all the right reasons, we will write the songs". Can't remember exactly who, or the exact quote. Obviously said during the '60s.
Personally, "Praise the Lord" and "Pass the ammunition" while you're at it.