Are all Americans racist?

[fishtea]

I noticed on the comments on youtube videos every second or third comment contains racism. Its always nigger this and cracker that and fuck the spiks and all this racist bullshit. The blacks seem to be the worst. I saw a video where a bunch of blacks beat the shit outta some white and knocked him out and all the comments were like "Fuck these stupid niggers" or "haha dumb honkey got knocked out".

Is everyone in America racist against all other races? I never heard any racist shit when I was in the country but there seems to be shitloads of racist bastards on the internet.