1. Normal dreamer has a body. Not a possessed one. An abomination has no issue crossing the fade like human/efl mages do.
2.Not a speculation. As xenophobic ozammar dwarves can be it's pretty clear they would ignore and look down on surfacers beliefs.
The chantry's version is no correct. All the did was take a half truth and then made up the rest of it. Sorry but the maker did not make the blight to strike down on magisters who walked the golden city. The blight was long time in the golden city and the magister just re unleashed onto the world in ignorance.
1.
You are making stuff up so hard to keep up with your bs that any debate is pointless ,in first place in link you provided there is absolutely nothing about abomnation dreamer not having a body , it only shows that dreamstalker drove guard crazy same thing that feynriel does to bandits if he stays himself... there is nothing about it not having body.
2.It is speculation as i said they have nothing to support their version pretty much their version is "maybe it is mega broodmother"
Once again chantry version is correct at least in part when magisters went to the black city and brought blights there is no discussion as i said we have Coryphus as living (well not anymore) prove that chantry was correct in that matter.And how do you know it wasn't maker punishment because im pretty sure it was never explained . 
Please, play with a warrior inquisitor, then with a mage inquisitor.
Tell me who kill more and make more damage.
If a simply child can create another blight, then all mages must be killed, not imprisoned in a tower, the argument of "security for all" isn't valid.
The "maker" should be the most powerful mage of the world, why he is not imprisoned in a circle of giants makers?
I cant believe how you consider "dangerous" ALL THE MAGES, and let free people like Lady Florianne, Samson, etc.
Turn down for what!
By your logic leliana can take 10 hits with 2h sword and fight like nothing because that what she can do in gameplay...