I could see this particular argument going round in circles for a long time - whether or not concepts actually have existence depends a lot on which definition of existence and reality you choose to adopt.
If your version is right, however, then we have a bit of a slippery slope where St Anselm's ontological proof for God could be valid.
Say btw, if you're sorry about God being a delusion, I'm sorry about Free Will being a delusion. :)
Perhaps that's why the claim that sexual orientation is mostly choice baffles me. (And yeah, I can predict that people will want to point out that I'm writing this of my own free will. Bah! No! Seriously, I just can't help myself!)
God is such a huge concept it's pretty much impossible you would think to disprove it.There are actually physicists like Steven Hawking,Victor Stenger,Steven Weinberg claim we could safely say it's disproved.