Who is this "we" you speak of?

I could care less about insulting another group.
In fact, I can't recall any Bronies I've seen insulting furries et al., leading me to think trolls are behind this. You have to remember, they are crafty in numbers, and it wouldn't be hard for one to disguise as a Brony in order to cause mayhem.

Generalizations are never good, friend, unless they have irrefutable evidence backing them. But yes, the few who are Bronies and do not act in good nature to those who do not deserve it should be dealt with; I agree with you there.

This has actually been a problem at times.
I've never understood the furry hate, even before ponies.
I think they've just become internet whipping boys, anyone who insults them is instantly cool/funny.
That said, I do see most bronies either supportive or neutral toward furries, so the problem is hopefully receding.
Live and let live, people!