Preserve the contentment of your selected community. People who gossip about other people's issues are generally less interesting than people who discuss ideas. You can change the subject yourself or be disinterested in the gossip/accusations. Influencers come and go. Water will eventually find its own level in your positive community of choice, so don't let yourself become intimidated. There are issues worth fighting for, but this doesn't sound like trouble worth fighting. Nobody is perfect. Let a blip be a blip.