Because Hate can turn you into an asshole.
(courtesy of the Westbro Baptist Church)
As bad as things may seem you just need to keep a cool head and keep things in perspective. Hate makes it too hard to take a step back and weight things up for what they are truly worth, so you and up doing dumb things that hurt what you never intended in the first place.
Hate is an inevitable human emotion, but let it out by vigorous swearing and punching something inanimate, don't let it get to you like the haters.
You can still have an opinion, but keep your cool and always back it up with reasoned intentions, always keeping in mind your intended aims. If you don't like something, by all means criticise it, that's not the same as hate.
(BTW, what are "fag enablers"? Do they mean smokers? Also, also: Colour, Aluminium, Kilometre, black pudding!)