Q:

Can circumcision perform by non muslim doctors? Because some say they don’t know the right method

A:

Any certified doctor can do circumcision. It does not matter whether they are Muslims or non-Muslims; it is a simple procedure. So any legitimate physician can perform it.

We cannot forbid things based on our personal opinion or speculations. In Islam, permission is the rule, and prohibition is an exception; we don’t need any proof for the former; we need evidence for the latter: i.e., prohibiting something.

So, I would advise not to bother with people who project their personal opinions as Islamic rules.

Almighty Allah knows best.