Jolly goodThis is what cheer squads are for.
Other supporters can support in whatever capacity they deem fit and it's laughable that someone would try make other supporters feel pressured to be more vocal.
Outnumber them, clap louder than the opposition, and dont clap at all after an opposition goal and you've already succeeded without deafening an ear next to you or booing. You're also on your way to becoming more of a gentleman. Well done