Why do Irish Americans have a problem with African Americans?

It might have something to do with the fact that the Irish people were oppressed just as the black people were and they were made slaves in their past also. They don't call themselves Irish Americans. They call themselves AMERICANS and they don't believe anybody owes them a damned thing. They are willing to work hard for what they have earned and are proud to be americans. I'm guessing that even though they were despised by many people during the immigration of the potato famine, they worked their way into our society and became the bedrock of America. They maintained their customs and traditions and didn't feel the need to hyphenate their name as has African Americans have. They don't have Jesse Jacksons and Al Sharptons dividing them, or Black Panthers threatening everybody who isn't black. They have assimilated into American society. A large portion of black america hasn't. And that indeed, is a shame.