Okay, lets try to clear this up for you. Are the 144,000 only natural Jews?
Rev. 7:4-8: “I heard the number of those who were sealed, a hundred and forty-four thousand, sealed out of every tribe of the sons of Israel: . . . Judah . . . Reuben . . . Gad . . . Asher . . . Naphtali . . . Manasseh . . . Simeon . . . Levi . . . Issachar . . . Zebulun . . . Joseph . . . Benjamin.” (These cannot be the tribes of natural Israel because there never was a tribe of Joseph, the tribes of Ephraim and Dan are not included in the list here, and the Levites were set aside for service in connection with the temple but were not reckoned as one of the 12 tribes. See Numbers 1:4-16.)
Rom. 2:28, 29: “He is not a Jew who is one on the outside, nor is circumcision that which is on the outside upon the flesh. But he is a Jew who is one on the inside, and his circumcision is that of the heart by spirit, and not by a written code.”
Gal. 3:26-29: “You are all, in fact, sons of God through your faith in Christ Jesus. . . . There is neither Jew nor Greek, there is neither slave nor freeman, there is neither male nor female; for you are all one person in union with Christ Jesus. Moreover, if you belong to Christ, you are really Abraham’s seed, heirs with reference to a promise.”
Do those of the “great crowd” referred to at Revelation 7:9, 10 also go to heaven?
Revelation does not say of them, as it does of the 144,000, that they are “bought from the earth” to be with Christ on heavenly Mount Zion.—Rev. 14:1-3.
The description of them as “standing before the throne and before the Lamb” indicates, not necessarily a location, but an approved condition. (Compare Revelation 6:17; Luke 21:36.) The expression “before the throne” (Greek, e·no′pi·on tou thro′nou; literally, “in sight of the throne”) does not require that they be in heaven. Their position is simply “in sight” of God, who tells us that from heaven he beholds the sons of men.—Ps. 11:4; compare Matthew 25:31-33; Luke 1:74, 75; Acts 10:33.
The “great crowd in heaven” referred to at Revelation 19:1, 6 is not the same as the “great crowd” of Revelation 7:9. The ones in heaven are not described as being “out of all nations” or as ascribing their salvation to the Lamb; they are angels. The expression “great crowd” is used in a variety of contexts in the Bible.—Mark 5:24; 6:34; 12:37.
Hope that helps. :))