There is a very good thoelogical reason for the Rapture. During the Church Age there is no differnetiation between Jew and Gentiel, all are saved by Grace believing inJesus as The Savior and Lord. All without distinction who are saved have God's indwelling spirit in them ... without regard to religion, race, national origins, sex, or sexual orientation. The believers are His Chruch and He is going to do what He promised the disciples in John 14, He is coming in the clouds to take away those who have died in Him and thsoe who are alive at that time, to take them back to the place He has prepared for them/us.
The Church is in Heaven when the scrolls are opened by the lamb. The Church returns at the end of the Great Tribulation with The Lord Jesus Christ in His kingly role.