Being against infant circumcision is being for the recipient’s choice of what they want to do with their body. If they want to be circumcised when they are above the age of consent, good on them, but they should be given the option.
Just like animal sacrifices, that are no longer practiced, practices in religion can change due to changing times. Being against change is one of the reasons more and more people are becoming atheist.
Feel free to give your thoughts and I’ll try to reply.