USA: I'm confused

Okay, I'm officially confused. Watching a documentary on BBC Three at present about the KKK, and something has confused the hell out of me. Namely

1. The KKK and Nazi party claim they're interested in "white power", yet last time I looked, the Jewish etc were white too, and the KKK are apparently (according to the "Loyal White Knights of the Ku Klux Klan") are against the Jewish too - why specifically, the Jewish?
2. The "Black Power" group (assuming I got the name right) claim they're against racism, are themselves, racist.

Did I miss something?

Whatever happened to tolerance of others, regardless of race, faith et al? (I can't be old fashioned - apparently I'm not old enough).

Black power apparently means unity between black people, and I can understand that, however, that then questions why they're apparently protesting against EVERYONE ELSE - why not just the idiotic racists?

As for the KKK - their getting a rock thrown at one of their vehicles - are they really surprised by this?

Hint - faith has bugger all to do with it, nor has race/color/sexuality/etc - you're either tolerant, or you're not (and first amendment doesn't mean you can be an arse, it just means you're a legally protected arse (hint: a tolerant person wouldn't care - an arse protests/fights based on color, sexuality, race etc)).

What's that you say, as a tolerant person I shouldn't question these idiocies? To that I say - do a bit of research ;o)
As I said, I'm confused, but as far as I am concerned, as long as you take and judge a person based on the person themselves, the rest is not important, never has been - never will be.

Sorry for the off-topic rant - I needed to rant and question (I had more to say (racism/prejudism should be shot to the floor immediately in my opinion (yep, that's the polite version)), but most would get nuked by legal in seconds).