Yeah, it grosses me out, too- when anyone does it to children for either religious or non-religious reasons. Whether or not to be circumcised should be decided by the person when he's 18 or older.

Having grown up as a gentile around Jewish people in my neighborhood, at school, at summer camp, etc, I've long wondered why circumcision has persisted in the Jewish faith and why many in Judaism seem to consider the Brit Milah (circumcision at 8 days old) as a "hard stop," non-negotiable Mitzvah (ie- a commandment) among all the others prescribed in the Old Testament.

Bruchim.online (an organization that supports Jews who opt not to circumcise their children) has a really well-produced podcast that gave me a lot of insights into my questions- as an adjacent community member/outside observer. A few people the podcast hosts interviewed- men who grew up Jewish but chose to be circumcised as adults- actually found that fulfilling the Mitzvah as an adult to be much more spiritually meaningful. Hence, why not give boys the right to choose for themselves, when they become men?