The kids should be a protected class. Culturally America has long said there should be no adult bookstores, bars, strip clubs etc. near schools and every state in the union has codes to enforce that. There are rules, regulations, rating systems for movies, television programs, video games etc. specifically to protect the kids. Certain products and activities are legally off limits for kids.
So when the left (or anybody else) starts pushing on kids inappropriate curriculum or entertainment etc. or any entity is pushing concepts that could be harmful to children, it is good and right that parents and other honorable people speak out and act to protect the children.
Nobody honorable is saying people should not have their opinions in these things. But honorable people protect the children.
I oppose any organized boycott for any person, group or entity for no other reason than expressing their opinion. I do support and have participated in organized boycotts against those who are intentionally and with full knowledge engaging in practices or pushing products that are physically and/or materially harmful to people.
And I do speak out and condemn the actions of those on the right who engage in cancel culture. One example was when a religious based group demanded J.C. Penney fire Ellen DeGeneres as their spokesperson in advertising. She was just an ordinary person advertising a product. They were wrong to attack her only because they knew she was lesbian and I strongly said so.
I try to be consistent.
But spontaneous boycotts of people of honorable people making choices based on their preferences, beliefs, opinions is fair game.