כז. וַיִּקַּח אֶת בְּנוֹ הַבְּכוֹר אֲשֶׁר יִמְלֹךְ תַּחְתָּיו וַיַּעֲלֵהוּ עֹלָה עַל הַחֹמָה וַיְהִי קֶצֶף גָּדוֹל עַל יִשְׂרָאֵל וַיִּסְעוּ מֵעָלָיו וַיָּשֻׁבוּ לָאָרֶץ׃
And he took his first-born who would reign after him, and brought him up for a burnt-offering on the wall. And there was great wrath upon Israel, and they withdrew from him and returned to the land.
1) Whose wrath was upon Yisrael?
2) Why was wrath upon Yisrael?
3) What was the result? Did they completely defeat Moab?
I've read various answers in various commentaries, but they all seem to make bold assertions without showing their work or proving their claims.