[Tzfat]

Doesn't this mean there has to be a Temple?

There will be a rebuilt Temple. But you are missing the point. Yom HaKippurim was NEVER about eternal atonement - it was an eternal statute, but its purpose was not eternal salvation. Your perspective is too tied into the anti-Temple theology of Christianity to understand why Jesus and His first disciples worshipped there - and were zealous for it.

Joel's title, and premise, is bogus. "Where do we receive atonement today?" - it shows a profound disregard for the timelessness of the Eternal One. "Today"? Please. He is eternal, and His decrees are eternal.

[Boogieman]

“Your perspective is too tied into the anti-Temple theology of Christianity to understand why Jesus and His first disciples worshipped there - and were zealous for it.”

Jesus and his first disciples were Jews, of course they worshipped there. Christians are not “anti-Temple”, but we do have a different understanding of the Temple.

The Temple itself was the House of the Lord, but if the Lord has removed his presence from it, it could never be anything more than a building. This is why those who would take it upon themselves to rebuild the Temple today are pursuing an exercise in futility. Without the Ark residing in the Holy of Holies, it would not be a Temple. Do the Jews know where to find the Ark today? If not, then they cannot rebuild the Temple, they can only build an empty vessel.