I think some people flagged it because so far 7 Million people have physically died from the C virus. Since most people on earth have no perception about the After Life and probably also, according to this perception, have lost beloved ones, I can understand why they would be not amused by this joke.
For this reason I also do not post anti-religion memes here as it would simply be unnecessarily adding fuel to the fire with no benefit for anyone.
Yes, this is a spiritual forum, but according to my experience, saying that you “are spritual” and “actually being really open minded” are two completely different things with most people. I know so many topics with which so called “open minded spiritual” people can be easily triggered and voilà, they become no longer as open minded and spiritual as they claim.