It is pretty simple to lookup the word delusion understand what the word means. Many of us know what it means but Christians don’t want to accept the fact that it proves they are delusional by definition.
Delusion: an idiosyncratic belief or impression that is firmly maintained despite being contradicted by what is generally accepted as reality or rational argument, typically a symptom of mental disorder
Yes, Christians, Muslims, Buddhist, and anyone that believes their form of a God is real and has any power to do anything, is clearly delusional. If we accept the claim from others that their God is real and we are expected to respect such claims, then I guess we should tell our kids that if they want to make up any kind of ridiculous lie that we will respect it and be happy for them to live such a life. What a Crock of Shit!