Those who comprise the Body of Christ, The Spiritual Church of Jesus Christ, dead and alive, will be caught up, caught away, into the clouds to meet the Lord in the Air and return to where JESUS told His disciples in John 14 He was going to prepare a place for them and return to take them there. The There will you be also is not here, it is THERE. The place is presumed to be Heaven since that is the theme in John 14 as Jesus gives the famous physics lesson for Philip.
The Theological reason for the Rapture of the Church prior tot he Tribulation is this: during the Church Age there is no differentiation between Jew and Gentile, as the Holy Spirit is put in the believers born from above. These indwelt believers are the salt, the restrainer of lawlessness during the Church Age. Their life message has no differentiation between Jew and Gentile. During the Tribulation, those named in Rev 7:5-8 are tasked with the evangelization of the doubting, lie believing, anti-Christ following WORLD. The task of the sealed 144,000 Jews is to proclaim the soon coming of The Messiah to touch down on the Earth and establish the Millenial Kingdom. The Church of Jesus Christ will be made The Bride of Christ in Heaven during the time the evangelization is occurring on Earth. Then, as shown in Revelation 19, that Bride will return with The Bridegroom, to utterly dstroy the armies of deniaers who are arrayed to annihilate Israel and all Jews fromt he Earth. These beast worshipping armies are arrayed to defeat The Lord of Hosts, The King of Kings, and His army from Heaven, an army comprised of those who came up tot he wedding from the first half of the Tribulation and the Church Raptured before the Tribulation started.
Here is Rev 7:5-8:
Rev 7:5 Of the tribe of Juda were sealed twelve thousand. Of the tribe of Reuben were sealed twelve thousand. Of the tribe of Gad were sealed twelve thousand.
Rev 7:6 Of the tribe of Aser were sealed twelve thousand. Of the tribe of Nepthalim were sealed twelve thousand. Of the tribe of Manasses were sealed twelve thousand.
Rev 7:7 Of the tribe of Simeon were sealed twelve thousand. Of the tribe of Levi were sealed twelve thousand. Of the tribe of Issachar were sealed twelve thousand.
Rev 7:8 Of the tribe of Zabulon were sealed twelve thousand. Of the tribe of Joseph were sealed twelve thousand. Of the tribe of Benjamin were sealed twelve thousand
Not seeing any testifying nor where it's just Jews.