It's quite clear that both sides of the aisle gerrymander. (I was in https://en.wikipedia.org/wiki/New_York%27s_28th_congressiona... when it existed; just look at that map!)

The point is, barring consequences for doing it, or a Constitutional amendment banning it, once the other side is doing it, you're fighting with one hand tied behind your back if you don't reciprocate.

It's bad, but it's largely unavoidable in the current legal setup.