USA is a country of immigrants though,all the top scientists,minds, entrepreneurs,businessmen,billionaires are immigrants.....in fact Trump himself is a filthy migrant,but unfortunately he was rejected by his own country.in fact the whole of America's continent 7,000,000 sqkm of landland its resourcea was stolen from the natives by immigrants whom proceeded to kill 600,000 of them in the great war.
He is right crime does go up when there's immigration.