I wouldn't say it's hate at all. the vast majority of 4chan's fuckery is for the lulz. it's fun to fuck with pretensious virtue signally faggots. it's so easy to trigger them. 
>pic related
I'm not sending anybody to the ovens (yet) but it's hilarious watching people get up in arms about it. 
>nigger nigger nigger
oh no get ready for incoming from every side. only stormfags use that word.
that's most of 4chan, just having fun with pretentious kikes. shits and giggles 
/pol/ is a little different because the moral faggotry is strong here. you have /ptg/oyim, trying to turn /pol/ into their cuckservative hugbox
>everybody who doesn't love Trump and Israel is a shill!
>shareblue!!!!!!!
not saying there aren't shills but it's these retards who get triggered and respond to them.
then you have stormfags, no real explanation needed. 

traditional media hates 4chan because in a free speech environment their master narratives fall apart. authoritarians can't tolerate that so they label the entire culture as hateful and dangerous.