"it IS religion that is at the root of most (all?) evil."
and are unable to support that statement; unable to back up the idea that the flaw exists in humanity with or without religion.
I can support that argument. The (all?) is clearly a question. Practicing a religion "as it is written" is what lead to the Crusades, the prosecution of Gallileo, the horrors of the corrupt early Popes, the slaughter of the native peoples of North America, most - if not all - of the thousands of years of violence in the ME, The Spanish Inquisition, etc. ad plenty-o-nauseum.
'it is religion alone that causes that subset to hold that they are more "God-like"'
What else besides religion teaches any of its adherence that they know God and/or are the Chosen People? That only by believing as we do can you enter heaven? I don't know of anything other than religion that promises eternal life, just for a "belief". Do you?