Were your grandparents here legally- were they put through the process of actually becoming an American? Or were they here illegally, like most of the aliens from Mexico? Are you here legally? How can I trust you even if you say you are because you are evidently someone who doesn't believe in the rule of law? BTW: My great-grandparents immigrated to the U.S. and became U.S. citizens, and I come from a family with a long heritage of God-fearing and law-abiding. Fellow law-abiders like myself do not usually look kindly upon lawbreakers, whether domestic or foreign.
First time I heard that the early German immigrants were despised. History does not bear that out. Sure there were problems with the Irish, but this was generally confined to New York City.
The comparision with the latest migrants is like apples and oranges. Like some came to integrate and eventually love America, others now come to exploit it's welfare system. Something the early immigrants did not have. Work, or go hungry, for them.
They worked.