Obama wants immigrants for the same reason that JFK devoted so much of his life to getting the 1965 Immigration Act passed, to replace the Americans with a more pliant voter, and a customer for the government programs.
Only half true.
He could import Eastern Europeans used to Communism if he just wanted the dependent class.
But his hatred goes a step further - gettin’ rid of whitey.
If he can’t exterminate the Evil Caucasians, he can always just drown them in a sea of non-whites.