aelf
Ashen One
I never really think the weight is heavier to theology than that of "social-justice" and "community survival and self-defense" just like the right-wing extremist based "intention", suicide is a grave sin in Islam (UNFORGIVEN), it's so hard to makes people believe otherwise, except under a strong pretext of fighting great evil for the greater good.
People shouldn't down-play what people can sacrifices and do for a good caused. Some suicide bomb operation in Turkey were executed by left-wing activist, I don't think they did that looking for heaven, most of them were atheist to begin-with.
And it's interesting that you said many of the terrorist mentor and religious teacher are against their act. The West deemed Abdullah Azzam as the father of terrorism, while the ex leader of Taliban Mullah Muhammad Umar as the highest figure in global Jihad world. But do you know that both Abdullah Azzam and Mullah Umar strongly against Osama bin Laden plan to carry out the operation to US civilian? When 911 happened, which was after Azzam passed away, Usama did the operation without consulting to Mullah Umar, which caused tension between Taliban and Al Qaeda, and you know where Usama bin Laden reside at that time? In Iran not in Afghanistan. Both Al Qaeda and Iranian government had an agreement, this was also the reason why there was an absence of terrorist operation in Iran until the conflict in Syria arise. But the invasion to Afghanistan was pretty much an event that once again sealed the Al Qaeda and Taliban alliance to fight one common enemy which is/was America.
And the common Muslim, that people scrutinized and beat the crap out on the street, or shot them in the mosque, don't know an atom of crap about that. By isolating and pressuring them, they just correcting the narration that the global jihad put forward, hence feed more recruitment. So I don't really understand some "leftist" intellect who get flip out ape like to all Muslim whenever a random operation happened. This stuff is very political in nature, and 99% of Muslim crowd don't know jack crap about this.
edit: And the source of contention between ISIS and Al Qaeda were many, one of it is, Al Qaeda forbid ISIS to do an operation in Iran. This was clearly stated by ISIS spokesman Abu Maryam (IIRC the name it was long time ago the research when I was still in Turkey)
That's why I put it down as "theological/ideological arguments". I agree the line between the two is blurry.
There are two broad strains of fundamentalism - one that is ultra-conservative and one that is radical. Radical fundamentalism tends to diverge a lot from the established theological schools, even those that are traditionally more militant. I believe Al Qaeda is of the radical strain, while the Taliban is of the ultra-conservative strain. I'm not surprised at all that they disagree except in the face of a mutual enemy. Same as the Iranian Revolutionary Guard vs. the Ayatollahs and the Guardian Council. That's what I learned anyway.
I also think that there's a difference between people who are simply swept along with a mass movement or with the weight of tradition and people who are active advocates and fighters. I admit I often personally lump the former together with the latter due to how much I disagree with both. But they're different, and the reason(s) they have are different.