1)
If the Bayis will be supreme, why will all passersby be astounded and hiss?
1.
Rashi, based on Divrei ha'Yamim II, 7:21: As long as Yisrael do not sin, the Bayis will be supreme. After they sin, all passersby will be astounded and hiss and its destruction. Initially, it was awesome even to Nochrim - "v'Gam El ha'Nochri
1
Others cite this in the name of the Ramban (Kisvei ha'Ramban 1 p. 368, 7).
2)
What is the meaning of "Yishom"?
1.
Rashi: It is to be astounded. This is like "v'Shamemu Aleha Oyveichem" (Vayikra 26:32), "Al Yomo Nashamu Acharonim" (Iyov 18:20).
3)
What is the meaning of "Sharak"?
1.
Rashi: It is to hiss. Everyone who sees sudden destruction does so.