Probably the biggest obstacle to understanding Christianity is an unwillingness to unlearn the traditions we’ve been steeped in, namely the futurism and dispensationalism popularized in the nineteenth century by the likes of such characters as C I Scofield and John Nelson Darby.
Once we understand that the Bible’s audience is Israel and that its time statements pertain to Israel during her existence, we begin to see through the error of fundamentalism. Then recognizing the similarities between the Apocalypse and the siege on Jerusalem in AD 67-70 also helps; it even becomes quite eye-opening. When we realize that apocalyptic language is not exclusive to the Revelator but is a language that Israel understood throughout her history, the parallels become easy to recognize.
Take something insignificant yet relevant, like the giant hailstones of Revelation 16:21, for example. 100-pound hailstones fell upon the people. A historical context can put this question to bed. After Jerusalem fell, the surviving Jews regrouped with the Sicarii at Masada (Rv 16:14-16), where they stockpiled their remaining arsenal of 100-pound ballista stones on the roofs of the casements they occupied to hurl at Rome’s Tenth Legion whenever it attacked the walls of the fortress. Flavius Silva, the procurator of Judea, had gathered generals and armies together from different outposts to attack Masada, the one stronghold of the Great Revolt that was still in rebellion after the fall of Jerusalem (Wars 7.8.1). Archeologists unearthed several caches of this ballista shot when they excavated the site in the 1960s.
Yep, that prophecy happened. They all happened, even the Parousia. Christianity can really be viewed from a distance, like a novel or a biography.