Its obvious from the fight over the wall that people want the crime to continue, as there is no other reason for people to cross illegally.
It amazes me when there is talk of a wall near a US City politicians and business people start talking about how it will interfere with business on both sides of the border, economic issues. I want to ask them what business they are referring to, since any legitimate business traffic goes through the Ports of Entry.
There is one other major reason they are fighting the wall being built. The Census. They need as many illegals as they can get as the illegals tend to concentrate in areas that will enable Congressional districts created based on raw population without any discount for non-citizens. Swings the electoral college in their favor and enables Democrat controlled districts to be formed with substantially smaller numbers of actual voters.