I have found people need to have the black experience first hand to really understand it's full potential... G-d willing most people will never know what evil blacks really are capable of.
You have an excellent point there. It's not that I think black people in general are necessarily inherently evil, and certainly individuals can be the exception that proves the rule, but you do have to be cautious in proportion to the very real increased risk of that population in general.
It's not racist to be smart about the risks associated with a high-crime demographic, or to notice that they are a high-crime demographic.
So many blacks have been brought up to HATE, with a passion. Most white people are too trusting, and don't want to judge badly other people, especially not based on race. There is deep and heavy programming there to keep them in check. Everything from public school, tv shows, popular music, and their own families indoctrinate them into being 'colorblind'. Most of them know they're not welcome at night in certain neighborhoods, but they use a sort of doublethink to avoid those situations. They don't want to actually admit, at least not openly, and often not even to themselves, that they see blacks as being more dangerous.
Blacks on the other hand have been raised to believe that all their troubles in life, from not having enough money to not getting the job they want, etc. is all because of white racism. This message is reinforced by schools, media, etc. too. This creates a resentment and a hatred that is deep-seated and very difficult to dislodge.