Most churches can tell a story or two like this.
One of the reasons I like mine is that we're thankfully mostly free of that political stuff, at least in the music areas. I don't poke my nose in the other areas much so I can't be sure, but we're a pretty congenial crowd.
Your music minister erred in addressing this. He should have been up front instead of sneaky - sat down with the two of you and had an honest conversation about how to best use your respective skills. "We need you in the sound booth" didn't fool anybody, it just led to hard feelings.
Praise and worship bands are not usually the pinnacle of musicianship anyway. If that guy was less skilled, but highly committed, he might have been "good enough." I ran one for a couple years because they needed me, and the effort it took to find music that wasn't utter crap was huge.
When they first invited me, I was playing organ. The current leader approached me after a service and asked somewhat pompously, "do you play piano as well?"
How do you respond to that? When they lob a softball, hit it out of the park even if it's church.
I replied, "No, actually I play piano as badly." Bah-dum-pah!