Some will want to attack the teaching of the Rapture because it gives comfort to those who Jesus loves.
And some learned and very hard-working and faithful Christians disagree that the rapture is accurate teaching and think that it is harmful to the Faith.
They will keep trying as a result of developing a form of mental illness that might be classified as spiritual psychosis.
One of the things I've watched go on and have taken note of through the years is this "mental illness" I think you're speaking of. The highlights went kind of like this as I recall: When I saw US POTUS debates in the early 2,000 era include the topic of homosexuality Romans 1 came to mind and how the US was clearly under judgment as God was turning more people over to their worthless/reprobate minds for rejecting the light He has given to all men about Himself; the next phase in the next decade seemed to be a growing lack of capacity for thought re: basic truths. There's a thread that runs through the Text with a word used mostly in the LXX in Proverbs but also into the NC that speaks of mental capacity for thought which God ultimately controls; now here we are looking like madness and absolute stupidity is spreading.
It's all hatred for God and Paul picks up this word in Philippians and ties it to love and how love increases. On the other hand, no capacity for thought re: truth, then no love. Jesus speaks in Matt24 of love growing cold due to lawlessness. It's all interrelated.
Rapture or no rapture, things don't look good in these times we're in.