Jews themselves are the biggest threat to Jewish survival. The intermarriage rate is ~50% here in the US (the largest population of Jews). A huge percentage, ~85%, of US Jews are Jews In Name Only (JINOs).
They might buy a ticket for the High Holy Days at their reform Synagogue, if they even belong to one.
"Jewishness" in America is almost a strictly socio-political mindset. Judaism is far, far in the background.
Real discrimination against Jews in America certainly does still exist. The primary cause are anti-God, anti-Freedom, anti-gun, anti-AMERICAN organizations like ADL who claim to speak for ALL Jews while pursuing their one-world-socialist agenda with world headquarters at at 823 United Nations Plaza .
I have read delusional posts before suffused with a touch of paranoia, but this one is really quite cutting edge.