Why do so many conservatives want to kick out Arabs and Indians from America?

geez...I was just reading an article about Bin Laden, and an Article about India's growing power, and some of the comments come from Conservatives, say "take back our country", "Kick out these inbreeds", "Indians are racist pigs." "Muslims can go blow themselves up." etc... and lately I've seen so many hurtful comments about Hindus and Muslims. They keep saying restore "Judo-Christian principles", how widespread is this feeling, and will there every be a time that there will be attacks on Hindus and Muslims? I don't see what we did, just cause of a few radicals why do they have to take it out on a community? Thanks