MakaB:
No. What I'm suggesting is very very simple. No fist at all.
You just take the Jewish star, and you keep the outline of it, and you shade in the entire star, so you don't see any lines crossecting, you just see like the shadow of the star. That is how the star looks on the Kahanist symbol (ignoring the fist). Its the Jewish star just completely all shaded in. It looks really cool like that, and will remind ppl. of Kahanism.
Once you've done that, then simply put the letters JTF in the middle of the star in stark bold font (maybe in white).
Let me know if you don't understand what I'm saying.