regarding the opinions of Syrians.. there was a poll conducted by some western organization called ORB International, it was conducted in all reagions including in Rebel controlled areas.
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In a rare survey of public opinion across all 14 regions of Syria, our face-to-face poll of 1,001 adults shows:-
There is a total rejection of dividing the country up; 83% oppose the country splitting into autonomous regions. There is also a great appetite for free and fair elections (and 41% say Assad should be allowed to stand).
But what of the millions of Syrians who have left the country since the start of the conflict? Of the three in ten (30%) respondents who say a first-degree family member has left since the start the war, only 24% think their family member will return if Assad wins, 65% if the Opposition forces win, and 66% if a transitional period begins.
41% say Turkey has a positive role.
41% say Russia has a positive role.
in areas outside of Assad contrtol 20% say Russia plays a positive role.
15% support the YPG.
10% support AlNusra/HTS.
30% support the EU.
32% support Iran.
35% support Hizbollah.
40% support opposition.
40% support Assad.
57% view Turkey negatively.
58% view Russia negatively.
64% view Iran negatively.
57% view Assad negatively.
88% view Alnusra/HTS negatively.
58% view the opposition negatively.
About ORB International
ORB International has been polling in fragile and conflict states regularly since 2004. Our work has covered Somalia, Afghanistan, Syria, Libya, Mali etc.
ORB International is the UK representative of Gallup International, one of the world’s longest running international research associations.
Edit: source.
https://orb-international.com/2018/03/15/syria-public-opinion-snapshot-2018/