What is Bil'am saying about Keini in this Pasuk?
Rashi: He is praising their good fortune in having attained such a strong position, because even if, at some later stage, Ashur will exile him together with the ten tribes, that will not mean total destruction, 1 because 'up until when 2 will Ashur exile him'? - Ultimately, they will return to Eretz Yisrael with the other exiles.
Da'as Zekenim, Hadar Zekenim: Even if Ashur will exile him, it will not be for a long time, and he will not be destroyed like Amalek. Therefore, one who feuds with Keini is a fool, and one who makes Shalom with him is wise.