Yes, Jesus has already come to earth clothed in human flesh. Since Scripture tells us He shall come again in like manner in which He departed from this earth, clothed in human flesh, how do you reconcile your opinion that Christ has already returned to the Jewish people again since none living in 70 AD speak of Christ returning again in human flesh then?
Just as it was necessary for Christ to resurrect from death clothed in human flesh, to prove death had no power over Him, could the Jewish people alive in 70 AD believe Christ had come again, as He said He would, since none of them physically saw Him?
Ac 1:2 Until the day in which he was taken up, after that he through the Holy Ghost had given commandments unto the apostles whom he had chosen:
Ac 1:3 To whom also he shewed himself alive after his passion by many infallible proofs, being seen of them forty days, and speaking of the things pertaining to the kingdom of God:
The disciples witnessed Jesus ascending out of their sight because He ascended clothed in physical flesh. In like manner (physical flesh) He shall return again, or Christ would not have said when He comes with clouds; "every eye shall see Him."
Acts 1:9-11 (KJV) And when he had spoken these things, while they beheld, he was taken up; and a cloud received him out of their sight. And while they looked stedfastly toward heaven as he went up, behold, two men stood by them in white apparel; Which also said, Ye men of Galilee, why stand ye gazing up into heaven? this same Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven.
Revelation 1:7 (KJV) Behold, he cometh with clouds; and every eye shall see him, and they also which pierced him: and all kindreds of the earth shall wail because of him. Even so, Amen.