2 Thessalonians 2
9 The coming [of the lawless one] is based on Satan's working, with all kinds of false miracles, signs, and wonders,
10 and with every unrighteous deception among those who are perishing. [They perish] because they did not accept the love of the truth in order to be saved.
11 For this reason God sends them a strong delusion so that they will believe what is false,
12 so that all will be condemned-those who did not believe the truth but enjoyed unrighteousness.
This is a prophetic snapshot of what it will be like after the Rapture for those left behind and because they rejected the truth about flat earth (just one of the many truths, not solely about the subject of FE alone), they will believe the alien disclosure lie.
It's not too late to keep doing genuine research about FE and being able to humble yourself to accept the truth.
The truth will set you free.
Science has proven Globe Earth. God designed each planet and you believe for whatever reason God designed Earth different from the rest when we have an outstanding amount of proof debunking a flat Earth theory that isn't verifiable.
Jesus has proven what his mission was. Nowhere in the bible does it talk about believing the flat Earth lie will prevent you from salvation.
There was no reason to bump this thread. Go spend genuine time in God's word and stop trying to apply worldly theories to his truth.