What do you have against Tom T., my friend?
You haven't been listening to the slander of his enemies, have you?
I having problems because it's the same old thing that was said about the Irish Catholics and Germans in the mid 19th century and the Jews and Italians in the late 19th and early 20th, and the Asians for the mid-20th... They don't fit in... they'll change things... they'll bring American down... Never happened.
Now there are a few problems with the present situation. One is that the left insists that the Hispanic immigrants don't have to assimilate. Well, the Irish, Jews, Germans, Asians did -- they had and still have their own newspapers and languages and communities. But they have to deal with the rest of the U.S. in English... Bilingualism does far more harm than good.
They should have a good knowledge of American history. When my grandmother was deep in Alzheimer's, there were two things she could remember: The main neighborhoods of Prague, where she came from, and every President from Washington to FDR, which she had to memorize and recite to be a citizen.
There's a lot of other requirements I'd put on immigrants: Keep their legal nose clean, don't expect any help, at least from the federal government (I'm sure there would be individual states and municipalities that would provide aid). We need better-controlled borders to weed out the terrorists and those who are criminals (in other senses than illegally immigrating).
But frankly, anyone who is willing to support themselves (or has someone who will do so), will obey the law, and isn't carrying a communicable disease should be allowed into the U.S.