There have been floods of criminals coming to this country since the beginning. Why change it now?
Because it is actually killing the economy here. I understand that the number is probably exaggerated but let's focus on the ~10M Mexicans. Maybe that's 10M illegals, but for this example lets just assume they are Mexican.
So they are illegal and mostly in construction of some sort and getting paid cash. Now it's usually a lot less than what people used to charge to frame but those guys work, show up on time, and actually you know come back from lunch. So their employer is happy to have them and will protect them if he can. Anyway they live with several people all making money(very smart) and then the money they get paid is plentiful for them to live, well like slobs but it's close to being a king in Mexico, and they then send half their checks to Mexico. They avoid the drug cartels by dong this, and they also avoid the crime in their own country.
Hard to fault anyone in this case really but it impacts America by creating a vaccum to suck money out of an economy.
So even if only 10% of said illegals are doing this, and most get paid 12-15 an hour tax free do the math:
12 x 2080 = 24,960 of income not being taxed at a 20% rate and half of it going out of the country so 5000 per person per year not going into taxes, and 12000 per year per person sucked out of an American economy.
5000 x 1M = 5 trillion dollars less in taxes per year
12000 x 1M = 12 trillion dollars out of American ciculation a year
And we aren't close to year one of this type of activity which is why Obama wants to print money to cover it up.
Remember estimation is 10M and I'm only using 10% of that actual number!
That's real math for you to either not care or......well not care!