It's a 1400 year old war. We can not 'win it'.

[scarletwoman]

2. I agree. As to your final question -

Why is the sectarian schism so sharp now? Is it the rise of Wahabbism?

I think the roots may be all entangled with the break-up of the Ottoman Empire, European colonialism, and the Cold War - when so many Middle Eastern countries were used as proxies/pawns in the conflict between the U.S. and the U.S.S.R.

In any case, decades of interference by outside forces were bound to create pressures leading to internal fractures and strengthening of reactionary tendencies, like Wahabbism.

I'm no expert, this would be simply be my best guess.