Immigrants MUST assimilate into our culture or we're doomed as a country.
But we have freedom of religion here and I don't see you demanding members of the Jewish faith community cease performing Bris. Even with genital herpes cases because of such "traditions."
If we really believe in a individual's personal autonomy over their body, *all* childhood circumcision MUST end. I know people are pointing to HIV reduction claims lately but here's a news flash: a sexually mature male can always choose to become circumcised himself, not at birth!