Basra is Botzra? Or something else entirely?

Ma'ayonei Hayeshuos, R' Don Abarbanel

Botzra refers to Rome, not the Botzra in [the desert of] Moav. Targum Yonason agrees that it's Rome.

Yeshua is Esav (ישוע הוא עשיו) who is Edom and Rome, and the xtian kings accepted it first so all xtians and believers in the religion of Yeshu haNotzri are without doubt bnei Edom bnei Esav.