At least the people singing along are actually, yknow, watching the show. That’s what’s disrespectful of the performers- I think most broadway musical actors would rather see someone smiling and singing along than checked out on their phone.
And I acknowledge that people may buy tickets to a show like Ain’t Too Proud to hear the professional singers. But perhaps other people bought their tickets to engage with music that is very meaningful to them? There is not only one reason why people may go to a musical. People go to concerts to hear professionals- and usually not just be professionals, but stars and the people who originated the music- but singing along is often acceptable or at least tolerated.
I have also never encountered in my life of theatregoing any audience members singing at a volume to rival what’s on stage. I’m sure it’s happened, but not at the frequency threads like this seem to suggest.
I also don’t think many people who do sing along are trying to draw focus to themselves. That’s silly, and seems like ascribing malicious intent in justify ire toward them.
I think both sides can accommodate the other without outrage and haughtiness.
"...everyone finally shut up, and the audience could enjoy the beginning of the Anatevka Pogram in peace."