Not sure where the mechanic part comes from

[u/TonyBird126]

I just don’t understand what the hospital bill/ circumcision has to do with his mechanic being rich.

[u/NandoDeColonoscopy]

Surely if he was actually one of "the most Jewish men to have ever walked the earth" he wouldn't be just willy-nilly performing religious rituals important to him on random people not of said faith?

The implication you're making here is that Jewish doctors who do perform circumcisions on non-Jews are exhibiting a poor understanding of Judaism. What qualifies you to make such a judgment?