Who is the "we?"
It's the Feds that ALWAYS STOP THAT!
Now, AGAIN, it's reached the stage where their children have integrated and the Left is shoehorning natural conservatives into one of their victim's groups (a HUGE and growing one) -- teaching them to be another "gimme" group with a chip on their shoulder.
We need to SEAL the border (and confront the crime and national security risks). NOTHING about us being overrun by illegal immigrants will change until that is done. And it hurts ALL those working (and looking for work and who plan to work - and those paying for "services" for those who don't work) who live on the northern side of the border.
“We” meaning when George W. Bush had the presidency. My own sense is that his personal warm feelings for the Mexican nanny he had as a child gave him a blind spot on the open borders question.