The Bible clearly says that God has not appointed us to wrath
1 Thessalonians 5:9
For God hath not appointed us to wrath, but to obtain salvation by our Lord Jesus Christ,
Many Mid and Post-tribbers will defend their belief by claiming God is able to keep us from his wrath during the tribulation. However, when they say this it only shows their ignorance for the English language and shows how lazy they are when it comes to studying the Bible. The Bible clearly marks the Tribulation period as the time of vengeance and wrath.
22 For these be the days of vengeance, that all things which are written may be fulfilled.
23But woe unto them that are with child, and to them that give suck, in those days! for there shall be great distress in the land, and wrath upon this people.
And if you search the definition for the word appointed it says
1. (of a time or place) decided on beforehand; designated.
If we are not appointed (time of place) of wrath. It means we are not to be in it! You won't find any Christians in the whole tribulation period. The Olivet Discourse in Matthew 24, Mark 13 and Luke 21 is all directed towards the Jewish people and the word Church doesn't even appear once in Revelation Chapters 4-19 which is the tribulation period.
Now think for a moment. What appeals to the flesh of mankind? They want to live on this earth longer, this is the sole reason Christians want to believe in a post-trib rapture. Because they could not care any less about being with Jesus. All they care about is life on this earth. Post-tribbers never do any soul winning because they believe there's still time left on this earth, whereas a pre-tribber will do as much soul winning as they can because they know the rapture could come any day and they must bring more people to Christ before it's too late. By examining the mindsets alone which pertain to a post and pre-tribber we can see that a pre-tribber has a much more godly mindset.