That verse doesn’t refer to the ‘rapture’ but rather to the Second Coming of the Lord and Judgement. I do scoff at the idea of a pre-trib rapture but NOT the Second Coming and Judgement.
There will be no mockers or scoffers left at the end of the tribulation.
There are two groups, the tribulation saints and the followers of the antichrist. Since the antichrist’s followers believe him to be messiah, how can they scoff about him coming if they believe he is already here?