Maybe it is because Jews are generally secure enough in their own beliefs that they don't feel the need to convince everybody else that they are right.
Both are great guys. Each has a great loving family. Each coaches little league. Each pays his taxes. They are religious. They are model citizens. They are friends.
Ask each of the other and they will tell you the same thing. He is a great guy and a great American citizen. They both respect what the other does and neither thinks the other is a better person.
Tom dresses as he likes, goes where he likes, fraternize with whom he likes.
Dick can frequently be told how to dress, where to go and with whom he may not fraternize.
Tom is a businessman (or just about anything else).
Dick is in the Service.
There are different rules to their lives. It doesn't make one better then the other.
People who don't understand why Jews don't proselytize, don't understand Judaism.
Judaism is for Jews (anyone who wants to be a Jew). The obligations is on Jews. We don't judge other Religions. We don't think others are better or worse. We don't think we are going to heaven and you're not.
Judaism has many rules. The rules are for Jews only. In the same way that a soldier has to follow special rules that a civilian does not. It doesn't make the soldier a better citizen.
For whatever reasons, it is Gentiles who ascribe to us their notion of "Chosen" as superior. That is not Jewish belief.
It is Jewish belief that we are special, a "Holy Nation".
One might say that a person is the service considers that they are special.
Anyone can join the Service
Anyone can convert to Judaism.
We don't proselytize because we see nothing wrong with anyone who is not Jewish. We don't condemn you to Hell.
If you want to join the "Holy Nation", that is up to you, on your own volition to decide. We take all, not just "the few and the proud".