Deporting all the illegals will make quite a dent in long term demographics.
It will be less brown by virtue of deporting illegal allies — combined with just letting immigrants come into America who are from traditional countries of immigration in Europe, Russia, Australia and New Zealnd who can add something of value to our economy. Ethnic immigration can work a reverse effect from that championed by the rabid freedom-hating, America-hating leftists who anti-white racists, and anti-Christian and anti-Jewish bigots.