Why do Blacks on here like to bash "Northern Ethnic Whites"?

I am Northern ethnic Catholic, half Irish, half Polish. Born, raised and live in Greenpoint Brooklyn. I have a question for you dumb bastards on here. If all of us "ethnics" are so racist... namely, the Irish, Italians, Polish, Eastern European, Greek, German, bunch... why are we the ones who live in Americas major cities around every type of culture, background, racial group, religious group and ethnic group you could name. The majority of us live in and around cities like New York, Jersey City, Boston, Philly, Baltimore, Chicago, Cinicinati, San Francisco... We are exposed to more cultures then your average person. You may take our attitudes the wrong way, but its how we succeed, we are street smart, gritty, family, moral, religious, prideful, city people who stick together. Maybe you outsiders do not understand, as we do not understand certain things Blacks and WASPs do. But we have our things and you have yours. Respect it. thank you.