What self defence class to take?

First and foremost, it is jiu jitsu not jin jitsu.. Second out of everything you mentioned, all of them will help you to become a fighter but honestly, only one actually trains "self defense against weapons, and other types of scenarios. Gracie jiu jitsu at its inception was not designed as a sport but was created for the streets so if it is being taught in that capacity at your school then you may learn something other than sport jiu jitsu and or kicking and punching from muay thai. I'm not knocking muay thai or any other art you mentioned as they are brutal and will toughen you up and probably make you a good fighter and honestly being a good fighter is usually a good enough defense, but if you are concerned about techniques for particular scenarios, and the school is legit gracie jiu jitsu, they should have some self defense curriculum.

Talk to the teacher to find out. Before somebody tries to chime in, I train bjj, under a particular gracie school and we do in fact do self defense classes. So please just stop.

Secondly grappling is excellent for situational self defense in that if you understand joint manipulation, there is no limit to what you can do when someone swings at you, grabs you, or points a weapon at you.

Nothing on your list was created for self defense. Everything you have is used for competing. You learn how to fight and compete under the rules of those sports.

Of course what is being taught can be used or adapted for self defense. But people tend to fight like they practice. So if you practice for the rules of a sport then in a self defense situation you will like respond like you do in the sport instead of using self defense strategies.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.