The fact that our country was built on this? Just because they aren't skilled doesn't mean that they would become a burden. Not to mention, one of the main problems involving America is skilled workers from other countries and our jobs.
I currently have a bilingual program in my school. It is open not only to those who first language is Spanish, but to those children whom want to learn Spanish as a second language. It's a very interesting program. Not to mention the fact that anything to help immigrant children learn is a thing for the better. Mainly becuase if these children don't learn and aren't able to make it in the world, then they are forced upon our welfare system and are leeches or are involved in gangs and are stealing and doing illegal things in order to survive.
I'll edit this and comment on it later. Sorry doing many things.