>>723860970
I THINK the Infinite reason is that rogue-cortana blew up the Brute's home world, so now they blame all of humanity for it and that's why the game starts with them blowing up The Infinity.
But yeah in Wars 2 they have zero reason to be assholes to humanity. Negative reasons, actually considering the already mentioned reasons.

>>718835342
At my secondary school I knew exactly one guy who had a PS3, everyone else was playing Halo. Until CoD 4 came out and most of them turned into the "lowest common denominator" audience we've been complaining about for many, many years since.