Oh Mother Agnes, the lying mouthpiece for the Assad regime. Some Christians not allied with the regime don't like her either because of her lies:
Archived: Syrian Christians for Peace: ‘Mother’ Agnus is an Assad agent in the clothes of a nun
Critics question Catholic nun's 'alternative story' on Syria civil war
1.) There is no information on al-Duwayr/Douar apart from pro-regime sources (including one that said that the entire population was killed, which is obviously false). And even in these pro-regime sources, no evidence is provided to show that it was any rebel, let alone "Islamic".
2.) There is no information on Oum Sharshouh. The earliest report that shows up is linked to in your link in which no proof is provided. Every other reference seems to be using that as evidence.
3.) Regarding the killings in Hatla, the majority of the dead were pro-regime combatants, not civilians. The group that said it was a sectarian killing and that it was mainly civilians gave another story in Arabic (that the majority of the dead were fighters). Unfortunately, many use this group as a unbiased source (I have also used it on occasion) but there are many who suspect that it is allied with the regime because of many of its press releases containing lies that are favorable to the regime. This group is called the Syrian Observatory for Human Rights which is not to be confused with Syrian Network for Human Rights (the former is bad, the latter is good). Here:
Hatla: fabrication of a massacre
4.) Your own link says, "However aid groups say minority Christians have often been singled out for attacks by opposition linked groups
as well as government forces in the heavily Islamic nation"
5.)
Catholic priest NOT among three beheaded on video by Syrian rebels, says head friar
With the clause that they could only fight against ISIS and not Assad? How nice of him. That's mainly why the train-and-equip program fizzled out; the biggest problem is Assad since his regime and its allies have killed 200k of the documented civilian casualties (96% of the total). Few rebels are going to be okay with the condition that they can only attack the symptom and not the root.
Anyway, let's assume all you linked to was true. That doesn't make Assad the better choice. He is, in fact, even worse than ISIS (who he actually supports in many ways, including by partnering up with it for oil):
Of the (at least)
"56 major massacres displaying obvious sectarian or ethnic cleansing traits......49 were carried out by Syrian government forces or local and foreign militia allies of President Bashar al-Assad."
A Damning Indictment of Syrian President Assad’s Systematic Massacres
