No, God's not going to reward a person's unbelief. There will be many believers left behind because they were not actually looking for Him at any hour or any day for His return. They were not watchful.
That does not mean that you are literally suppose to look all around trying to see Him come down in the clouds, this means that you believe in Him and be ready by living the way God is willing you to live.
God shows know personally favoritism.........................
If you believe in Him you will be raptured, no matter when you believe that rapture will happen. Because the belief in rapture is not the factor to be raptured. It is your belief and faith in the Lord.
If you believe He will leave some believers behind, and only take part of the believers then you are saying God shows favoritism. Which the scriptures clearly state in three places in the NT that He doesn't.
The scripture that says two will be in the field one will be taken and the other left, is speaking that the one taken is the one who believes in Him, and the one left is the one who doesn't believe in Him.
Not about one believe the rapture to happen then, but the other didn't. As long as you believe in Him when it happens you will be called.......