If they weren't doing somethinhg they shouldn't have been doing then they wouldn't have been in that position.
"...not people who want to come make better lives for their families."
When those people want to make better lives for their families at the expense of the quality of life for our own families, then they are not welcome. And we have enough home grown criminals without giving a whole bunch more a pass on their utter disregard for the law. Of course, those responsible for enforcing the law seem to have equal disregard for it, so it's pretty hard to expect anyone to take it seriously.