Why do the Druze, Cherkezi and even Bedouins (Muslims) join the Israeli Defense Force

Does any other group of people join the IDF that I should know about?

I knew about Bedouins the Drucie part is news to me.
well the bed us join the IDF Cos they are sick and tired of the high handed attitude they get from Arabs who consider the bed us beneath them. Cos they dark skinned and dint have money Arab society looks down upon. This is the truth no matter what other rhetoric anyone else gives you.

Because military service is tribal and family tradition for these groups.
They join army in any country they reside.
Besides, because of their educational level, in many cases this is the only employment they can find.

The Druze are loyal to their host country. The Bedouins join so they may be considered loyal Israelis and further their opportunities in the future.

The problem is not with Joining the IDF. In every country there is a military and the citizens in that country are supposed to serve the country and it's military. There is no problem with Joining the IDF as long as they don't go to the Palestinian territories. Nobody cares whether you serve in Tel Aviv but stay away from Gaza and the west bank.
And to why those groups join? some are traitors and some consider it loyalty to the country that gave them citizen ships just like other nationalists..

Because they want to. Simple as that. as to why they want to, well, each one might have a different reason.

Any Israeli citizen can join.
There are lots of Muslim and Druze Israelis. Once a Druze served as Acting President.
They join because they support Israel, basically. Israel has complete freedom of religion, and is a better place to live than Gaza or West Bank.

Because they are loyal to whatever country they live in. And by the way, Bedouins are not Muslims.