Looks like past research plus this thread, particularly the Aleppo connection, wraps up most of the first-level answers to Q's questions; like the pyramid, there are more levels of answers to come. I'll add my own thoughts. A keystone can mean a capstone on the top of a pyramid, although Q uses the word in other ways too. A pyramid without a capstone represents unfinished, ongoing labor (see dollar bill, Masonry); with a capstone it represents work completed under whatever god is symbolized by the capstone.

Obviously Egyptian pyramid symbolism followed the same demon-inspired cults and so Epstein was largely modernizing old methods. Pyramids didn't actually have that many chambers, they were mostly stones; but the chambers themselves allowed human "protection" for the idolatry and crimes against humanity committed there. I'll quote again the taunt of the rich in the end time, calling to the mountains and rocks, “Fall on us and hide us from the face of him who is seated on the throne, and from the wrath of the Lamb, for the great day of their wrath has come, and who can stand?” Note they are trusting in their mountains to hide them from what they misconstrue as "wrath of the Lamb" (lambs are not wrathful). For the unspeakableness of the things they do there, see Ezekiel 8-9.

But the outer shape of the "keystone" is a cube with a dome top (both motifs used frequently but not solely in Islam). The dome represents the womb (as contrasted with the obelisk), and is often compared to the seats of power in the Capitol and the Vatican (and sometimes London). The particular color alternation above the door reminds me of the mask of King Tut, which represented rays around his face and which stands for the glory of God (shekhinah) granted to those in whom he is pleased. Satan, the angel of light, does masquerade this glory on occasion. Hope these neglected aspects help.

They do not think the Messiah has come yet.

So your question is fair, buy your conclusions are ill informed. The Temple has to be re built a third time and it has to be defiled for the Yeshua to return and fight the abomination of desolation.

Jews want to rebuilt the temple im the place where God's presence descended first where the first temple was built. Nothing weird about that. The dome was built to prevent jews from rebuilding it. Muslims are just fucking with them.

The first sacrifice before anything else is brought to the altar ( permitted by the Torah) needs to be an immaculate red heffer to Jehovah (God). No spots, blemishes, defects, or birthmarks. This will may not happen if Revelations interpretation is correct about the abomination of desolation.

You implying that their first sacrifice is purposefully done to defile Gods temple is wrong. Someone will defile the temple before the heffer is brought forth, rendering the temple useless for jews. That's when Yeshua's second coming is REALLY at hand.

Believe it or not, it's possible for Christians to countenance animal sacrifices to Yahweh as symbols of Messiah's once-for-all sacrifice, even if offered by priests in partial unbelief. Evidence, (1) covenant people offered these sacrifices for millennia looking forward to Messiah's sacrifice, (2) Paul paid for some of these sacrifices, offered by unbelieving priests, about 20 years after he got saved and while he was in full possession of Christian theology (Acts 21), (3) Paul teaches in Colossians 2:16-17 that meat offerings still remain after the temple (present tense) as a shadow of things still to come (Messiah's return). This is why there is a subset of Messianic Judaism that favors animal sacrifice in remembrance and further foreshadow.

It is also true that the Satanic network desires this mountain and is prophesied to have partial control over it. Therefore it is probable that true Levitical sacrifice will not be the only sacrifice attempted there; I understand Antiochus IV sacrified a pig there in 168 BC, as a type of things to come.

That being said, Swamp Rangers does not argue about eschatology; we point out that many eschatologies are not excluded and that one must make the best choice of interpreting what has been revealed. Same as Q, by the way. Also, that's not why I came to this thread.

What is standing on the holy place? Mosque.