Do you have evidence to say that immigration damages your country?

Wow. Just wow. So many unsubstantiated claims and name-calling, but I think I only saw a single link to one article out of more than 200 replies? Is this really the best the anti-immigrant crowd can do? I really would like to read some well-researched articles that provide evidence of the damaging effects of immigrants. The ones I've seen tend to focus on the costs and leave out the financial contributions like paying taxes, increased spending, etc. I've seen a number of articles that provide actual data showing that the financial contributions of even illegal immigrants exceed the cost of the services they use. Surely someone must have researched information that would support the belief that immigration negatively impacts their country.

Anecdotally, I know that immigrants can negatively impact a specific area and service, though this would be a local or possibly regional impact, not a national one. I lived in a border city near Mexico for a few years, and the local hospital services were stretched thin by immigrant women who would cross the border to have their babies in the US, thus obtaining US citizenship for their offspring. The number of babies born far exceeded that which would be expected on the basis of the local population, and the hospitals provided those services on an emergency basis, even though the cost of extra nurses, doctors, and other personnel and infrastructure were costs they would never recover. That was well before 9/11, and crossing the border is much more difficult now than it was then, so it is likely less of an issue at present.