Shermana
Heretic
There are many reasons that Jews don't proselytize.
One reason is that that God already has a relationship with humanity that started with Noah. It was that relationship with God that Abraham and Sarah taught their guests about.
The fact that God and Abraham forged a special relationship doesn't invalidate God's relationship with people who aren't Abraham's descendants.
As such, there is no need for non-Jews to become Jews. If they want to, they have to want the whole package, including commandments that don't make logical sense, other than "because God said so".
I don't fight hard to "prove" what I believe because you can't prove faith. I could rhapsodize about the joys of keeping Kosher, sexual modesty, Sabbath observance, or any number of other things people who don't believe as I do consider outdated, outmoded, or unnecessarily strict.
The thing is, they don't believe as I do. No matter what I say, it isn't likely to change their minds.
The good news is that non-Jews were never obligated to do those commandments beyond the Seven Laws of Noah, and their many facets.
It makes me sad when Jews aren't interested in being observant as I try to be, but everything good they do counts to the good.
I might try to explain myself better later.
I should state here again that the 7 Noahide Laws is a completely Rabbinical concept that has absolutely no scriptural basis. The gentiles are expected to obey all the Laws as well as the Israelites when dwelling in the land, that's all the scripture says (And must be circed if they want to celebrate Passover). Even the Book of Jubilees which is the best source of the Noahide Laws, has a different set. It simply has no basis, even if its an ancient tradition. There's no reason to believe that those are the only 7 rules which nations are expected to obey and are crushed for not obeying.
With that said, Jews were very active in converting people in the ancient days. What's the point of being a "Light to the nations" in the first place? Clearly, the only reason why Jews stopped prosletyzing was when the Church and Muslims banned it, there is no excuse now. Heck, Orthodox prosletyzing just to reform Jews would be a great idea. There's a reason why half of Jews intermarry these days. Without prosletyzing, a religion cannot expect anything but to stagnate or decline IMO.