I don't think that is necessarily the case. Most fans just want to leave the ground peaceably and do not have a testosterone point to prove with the away fans. I suspect that the majority would stand their ground for the right reasons.
"if my posts and opinions irritate you, then there is a really, really simple remedy for that. It begins with I and ends in ORE"
Oh, OK, I get the first bit but am so struggling to find that word.