There is no extra tax on Dhimmis, zakat is paid by Muslims and Jizya or Ashar is paid by Dhimmis. Also, if Dhimmi communities agree to defend themselves, the =y dont have to apy jizya (which kind of blows a hole in your "no wepaons for dhimmis" theory) Honestly, I dont even know where you got most of those rules from, but even if some Muslmi society decided to do that, it would still be totally unislamic.