Liked a lot of what you said. Got to run, but will return to this. There is no future prediction of another return of Christ. Not ruling it out, we just don't have anything to tell us this. The judgment that fell on Israel in 70 AD was done under the guidance and presence (parousia) of Christ. He warned them over and over what was coming, didn't He? He didn't just sit up in Heaven as a quiet observer. He was very active in the overthrow of Israel using pagan Rome just as God did several times in the OT.
Christs parousia was active in a number of notable places throughout the Bible. He was with Joshua at Jericho and brought the Babylonians down on Judah to cite just a couple of incidents. Paul says that we are waiting for the blessed hope, which most of the church has believed to be Christs second coming since his day. AD70 was hardly a blessed hope at least it wasn't for the estimated 1.5 million Jews who experienced it. Also whatever position you take on the rapture according to Paul there is going to be one which doesn't square with the idea that everything happened during the Jewish War