You explained the nuance of terrorism and Islam and I get that. I am sure Muhammad did not intend for Muslims to become terrorists . You have been handed 1 religion starting from something like 650ad.
You also need to understand nuances before you go about saying caste was created by Hinduism. There was no one religion called Hinduism. Its much more organic and there are several followers of hi duism and caste be ame a real problem only after the British came to india. Prior to that there was no real issue with caste and people did what they did for a living. You can throw mud but it just reflects even more.badly on you.
Tell me how it's selectively implemented
Yup, I like you admit that. It is more like low intellectuality and only surface understanding on Islam by those terrorist where their leaders dont even have Islamic scholar credential, more like common people with lot of cash like Osama bin Laden that some how think they need to make some change in the current world order.
AQ is basically the start of terrorism in Islam after what happen in very early Islam, the killing of one of the most respected individual in Islam who is Ali Bin Abi Thalib where all prophet Muhammad offspring we see Today comes from his family.
Those people cannot think in substance, like for instants they think our ideology Pancasila is Kafir just because the name is Pancasila, not something Arabic. Where if you see the substance, Pancasila and Islam is very coherent with the first principle is Tauhid ( Believe in one and only God ), state system is Democracy as it is inline with Qurani teaching in surah As-Syura (The consultation), while the rest of principle is stiil inline with Quran and Hadith (Kemanusian yg adil dan beradab (High moral people) and Persatuan Indonesia ( Unity of Indonesia-where it is inline with Madinah Charter created by prophet Muhammad ).
With current system, many Shariah Law also can be inserted into our positive law if the parliament is agree, in fact there are many Shariah Law become our positive law like in Economic law as we have Islamic Economy system along with Sukuk, Halal universal obligation, Shariah banks, and others.
That terrorist is just a dumb people who think Jihad is just physical war, even they dont know the real meaning of Jihad. Killing a civilian during a war is a big sin in Islam. Quran said that killing one human without justice is similar like killing whole humanity, even later Quran forbid the killing of combatant enemy during a war if they want to surrender.
Quran comes from God, we need both high intellectuality, patience to read the whole verses, and clean heart in order to understand it. And also other important things are God acceptance (Ridho) and direct direction through our heart (Hidayah) in order to understand Quran deeply. Muslim who understand Quran very well is called as Ulil Albab and they are among the minority who has been given Hikmah (wisdom knowledge ) by God directly beside prophets.
Many Terrorists just read individual text in one or two verses about war without reading whole surah and understanding the context of those verses they are reading. The Surah about war and its law can be read in Surah Al-Anfal in more detail.
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Talking about what you said earlier about so called caste system in Muslim South Indian, that is just a class between human and only become matter when it comes to find a husband or wife, not a problem in any social, politics, and economic activity. That class is very human and some within the society can break that culture easily if they want as what I have stated in my previous post.
While Caste system do exist in Hindu religion, you must to admit it mate. Indian element in current political system ( democracy ) that try to fight against it since it is contradictary with Democracy system that Indians adopt from Western civilization. Indonesia Hindu admit caste system is exist in their religious and social live
For Islam, democracy is inside our religion since the start with the surah As-Syura calling Muslim to solve their matter through consultation. The leadership in early Islam for example is more like Republic and the system is more like democracy where first Caliph for instants is picked after long debate between two big group Anshar and Quraish, there were voting underway as well according to famous Egyptian Historian, Muhammad Haiqal in his Muhammad Biography book ( 3 very thick books/Volume )