I'd suspect that OP was referring to the first century CE when Christianity could be said to have "won out" over Judaism, and yes then Jewish people often were

I'd suspect that OP was referring to the first century CE when Christianity could be said to have "won out" over Judaism, and yes then Jewish people often were racist in that way, just like people of most cultures then. Nowadays Jewish people aren't racist at all, or at least less so than the average American or European - and OP should have acknowledged and phrased that better.