America doesn’t spend that much on immigrants who are not here legally.
Mary Ann Johnson

Illegal aliens use government services or services that are partially funded by taxpayers like schools, police, legal system, jails, Hospital ER services, fire departments, etc. As soon as they have a baby born on American soil, they ARE eligible for all sorts of benefits for children & mothers, which of course benefits everyone in the household. The tiny bit of sales taxes they pay doesn’t begin to repay what they cost us. Yes, they DO commit crimes at a rate higher than native born citizens. These are all documented facts, I didn’t just make this up, I do research. 
How American Citizens Finance $18.5 Billion In Health Care For Unauthorized Immigrants