Why not let your kid wait until they actually want to join your faith before them voluntarily doing it? It cannot be easily undone.
It can not easily be chosen either… Should I raise my children away from jewish life until an age they can voluntarily choose? Should I deny them the experiences of growing up jewish and then ask them to undergo adult circumcision, to study Tanakh, to hold the sabbath, etc? We all make decisions for our children. If as an adult they want to abandon a jewish life that is their decision, though I would be sad. I want to give them a jewish life from birth and to raise them in an explicitly jewish home.
I’m not saying you can’t raise your kid to be Jewish, but a circumcision cannot be undone and it’s something your child should do of their own consent. A circumcision does not make one Jewish.
You clearly know very little about religious Judaism if you’re saying that it isn’t a requirement for being Jewish. It’s one of if not the most important aspects of being Jewish in a biblical sense.
Of course it doesn’t. That does not mean it isn’t a significant and meaningful ritual for many Jews and Muslims.