@Falcon29
ISIS will probably concentrate on consolidating themselves in Eastern Syria and conquering all of Deir ez-Zor.
All groups in Syria somehow cooperate as strange as this sounds (see my example in post 7421) as long as this benefit their short-term plans so ISIS, Al-Nusra, FSA/remaining Syrian opposition and YPG should concentrate on fighting the Al-Assad regime purely and his Shia terrorist militias.
ISIS should consolidate Eastern Syria along with YPG, Al-Nusra and FSA/Islamic Front/Syrian opposition groups Northern Syria and FSA/Syrian opposition group should focus on the South (Daraa). All simoultaniously more or less. Turkey, Jordan, KSA should aid FSA and the Islamic Front. That would be the death of the regime.
Simiarily the Palestinian diaspora in Syria should be armed against the Al-Assad regime. The West would be unable to do anything about it.
Had ISIS not been attacking everyone and not been this radical Syria would have been liberated a long time ago and the most radical people/groups could have been eliminated once that occurred. The West would have supported this too.
All players in Syria have failed IMO with their plans because they were too passive when it mattered the most.
Of course people in Syria that live in cities and villages were they are starving to death, where electricity has been cut of by the regime, that are suffering from barrel bombs on a weekly basis will become "radicalized" and join the strongest party on the battlefield which is ISIS in Eastern Syria. People are idiots if they expected anything else. They would have "supported" ISIS in their place too.
If those cities were to be captured by the Al-Assad regime and his Nusrayri thugs they would all be killed. At least the men.
Let the strongest win. I have no reason not to believe that Syria will not be ruled by the Sunni Arab majority as it always were before the Al-Assad genocide family. The Nusaryis and Shias will pay for their crimes. Their chance of speaking out against the Al-Assad genocide passed eternities ago. No point of return now.
Terrorists must be dealt with harshly. The Syrian opposition should go all in and clean Syria once and for all. The Shia's are doing that with Iraq (where they will always fail) while we speak and their Shia fanboys have no problems with them doing that so neither should we in Syria or elsewhere.
King Salman should double the support to the Syrian opposition.