Actually the funny thing is a Flat Earther recently debunked FE himself!
His name is Rob Skiba, former FE believer, have a look at 7 min here

And have a look at the comments section, it is hilarious ^^
Come on guys, you are all free to believe in Allah or Jesus. Nobody will take it away from you. Respect to all religions. But please stop indoctrinating uneducated and fragile people. You are compromising your place in Heaven by doing so!