Why differences between Black, Hispanic, and Asian demographic success?

My question is in every city in America the worst area and most poor area is Black and the second most poor or dangerous is Hispanic but how and why have Asians bucked this minority trend? Engineering/math classes in college are either (east) Asians or Indian (Asians). Even the blue collar Asians have very nice homes and nice yards and you never see a Asian homeless guy. Asians have amongst the lowest homicide rates.

So if many Asians were “brought” here by the white man to build the railroads and Hispanics immigrated here and blacks were brought here by slavery and all three ethnicity’s started from the bottom why haven’t Asians fallen into the “trap” that some claim that the man is holding them back and it’s a white man’s world…well the Asians have progressed and other ethnic backgrounds haven’t….why? I have seen many poor Asians that take such good care of there house and cars even thought they only make very little money and they are very polite people.

Another thing, I have talked to many immigrant Africans who don’t like American black people b/c of the way they act and conduct themselves and I have been asked by people from Africa why are American blacks so violent in America? I have been told by many immigrants from Africa that say “they should be so happy just to be in America they have no reason to be mad and depressed”

So how have Asians Americans advanced and progressed and blacks and Hispanics not ? I’m talking as a whole society. You don’t see Asian hoods in every city or Indian thugs on every corner in the hood.