One of the constant refrains of the real Jew hating far-right is a negative obsession with our circumcision of Jewish male infants. The synagogue in Pittsburgh was hosting a “brit” - a circumcision this morning.
I also don't know any right wingers among anti-circumcision activists in the US. Vast majority lean toward human rights/children's rights/social justice activism. And there's a %age of Jewish intactivists beyond their numbers in the general population.