Anti-circumcisionist

Some anti-circumcisionists would outlaw the practice of infant circumcision, even for religious reasons.

Source: wiktionary

Pro-circumcisionists have marshalled as many arguments in its favour as anti-circumcisionists have marshalled against it.

Source: wiktionary

Entrenched customs die hard, and the task facing anti-circumcisionists is daunting. They can take heart, however, from the precedents: foot binding and widow burning, once widespread in China and India, respectively, have been abolished.

Source: wiktionary