Yeah, I'm not so sure she's really going to see your DH as "the jerk" in this scenario.
I also don't think I'd be arguing w/ my DH for months over a concert.
Unless I just objected to the band for moral reasons or something similar, I'd probably just suck it up & go w/ my DH if I knew the band & concert was something he'd really enjoy... because, goodness knows, my DH has done stuff for & w/ me that probably wasn't necessarily his choice.
If I just really detested the band & absolutely refused to go, though, I'd tell my DH that he could either go alone or find a friend to go w/ him - but I wouldn't be grumpy or argumentative about it.