But if someone says "Take my side or you're a murderer" they don't care about the kids, they just want to use their moral stance as an excuse for social dominance, which is why many people end up resisting "good causes" to defend themselves against the garbage energy that's hidden behind their "morally justified" anger.
In reality someone either has a sensible opinion or they don't, and you're not gonna pressure anyone into changing their mind with force anyway, so it's just a self-serving excuse to take your neuroticism out on other people.