It was a great tribulation.. Why would you minimize their suffering? Have you read Josephus? Titus hired him to write the history so he was sort of sugar coating it, but it was terrible.
Its true that Christians had no interest in Jerusalem until Constantine's mother took an interest in finding the holy sites.
The Valley of Jehoshaphat is the same as the “valley of decision.”... probably Kidron.
Some literalists and evangelicals believe that during the millennium Christ rules as king from Jerusalem... instead of a spiritual kingdom.
The "great tribulation" is for everyone, especially the nations/Gentiles. The "great tribulation" will be "cut short" for the "elect", less no one would survive (Matthew 24:24). The fall of Jerusalem in 70 AD was simply the 3rd fall of Jerusalem. Now that Jerusalem has been "restored" (Joel 3:1), the valley of judgment can proceed against the nations/Gentiles. Jacob will be saved (Jeremiah 30:7), but the nations/Gentiles, "I will destroy" (Jeremiah 30:11). The nations still rule to this day. They have not been "all crushed at the same time" (Daniel 2:35 & 44-45). The "great tribulation" is "such as has not occurred since the beginning of the world (Matthew 24:21). The 70 AD fall of Jerusalem resulted in about 1 million Jewish deaths, a lot due to infighting among the Jews. The nations, in the form of Rome, the legs of iron, were pretty much left untouched, for they starved out the defenders. Rome was not crushed at that time, and Titus walked away to later become emperor of Rome. The valley of Jehoshaphat (judgment) is the valley of Jezreel, which is in view of Tel-Magedon, is north of Jerusalem. The dead are in the grave, not on a cloud playing a harp. The nations will worship the king in Jerusalem, by keeping the feast of Booths every year (Zechariah 14:16). And the "Word of God" will rule over the nations with a "rod of iron" (Revelation 19:13-15). And David will be king/prince over Israel (Ezekiel 37:24 & 28) & (Ezekiel 34:24) on the land I gave Jacob (Ezekiel 37:25).