It is an act of love for many. A love of free school, free food, free rent and free health care. I don't blame them any more than I blame the raccoons who eat the dog food left on the back patio. If they bothered me I'd stop leaving the food out.
Exactly. And they drive like total idiots.
If you follow the money things may become clear.
Also those seeking to get and hold office see these invaders as a power/voting base.