I thought you might like seeing that it is not just here that globe earthers insult people who do not believe in their lie. But it also happens at other christian forums.
I've no doubt that it's not only here that some people say, or imply, "if you don't believe the Bible the way I do, you don't believe it."
That has been said on here; "Globe earthers don't believe Genesis 1", "I believe God's word",( implication; you don't). "You don't believe God's creation but science's lie."
You, yourself, once said something like, "you don't believe God; end of."
This is all nonsense.
The shape of the earth can be, and has been, proved. But in any case it has nothing to do with the Bible or the Christian faith.
You're not a better Christian than us; more faithful, more devout, know God better or have received more of his Spirit because you believe the earth to be flat. God doesn't love us more than you because we know that the earth is a globe.
If people "insult flat earther on other forums" it's probably because the f/e-rs are putting forward the same arguments, not understanding Scripture and unwilling to listen to reason.
Insults should happen, but I can understand the sheer frustration at talking with someone who doesn't want to listen.