This is what fundamentalists in Islam & every other religion use to justify terror... You said this yourself... Yes muslims are used by fundamentalists but does this include all muslims... Fundamentalist use people in all & every religion though differently....
If you have preoccupied yourself then no point arguing.... Do you know Arabic... then you would know what Kafir really means. Its an arabic word for non-believer.. If what you had said about death penalty by state for being a Kafir is true then we would have known it in todays world... don't you think so... What you are saying is not practiced in any country on a mass level.. It might be ~1400 years ago but not now.....its the handiwork of terrorists who have no moral values...
Ali Sina is also preoccupied by what was written 1400 years ago for the contexts valid at that time.... People had tried arguing with Ali Sina but he is preoccupied like most in this forum. he has to run the propaganda..
Islam is changing though very slowly.. but preoccupation like yours will only instill insecurity... What is highlighted is not practiced by most muslims but a handfull... Maniacs are found in every religion... otherwise Hindu fundamentalists would not resist Valentine's Day....
Terrorists are brainwashed all over the world.... With muslim terrorist people have used religion to brainwash... but how many Indian muslim endrose terrorist groups... Hell how many know the names of leaders of these terrorist group....
So what is practiced by muslims is not what was written for no reason... I do agree that most muslims also don't know the context's of Koran... This is where education comes in....
To enlighten you only ~6% of muslim children go to madarsa... people are trying... You cannot expect change overnight.... But don't loose faith still in common Indian Muslim for Paki propaganda...