If the USA tried to again be a White/European ethnostate and allow anyone with Caucasian heritage to immigrate and barred everyone else from immigrating, then no one today would accept that.
And if they went full on apartheid and started putting natives and minorities in locked down ever-shrinking reservations, people would really lose their shit.
When white nationalists try to advocate for such policies, they are rightfully criticized for being racist.
I can never understand why Israel gets special treatment in that regard.