Why did he mention a person sinning against another?
Malbim: This is a continuation of the nation's complaint against Bnei Eli. Eli and his sons were judges, to rule about one who sins against his friend. If one will sin against Hashem, who will judge him? Bnei Eli themselves disgrace Kodshim and revile Hashem!
What is the meaning of "u'Filelu Elokim"?
Rashi: The judge will judge us. U'Filelu is an expression of judgment, like "v'Nasan bi'Flilim" (Shemos 21:22).
Radak citing Targum Yonasan: If one sins against his friend, they go in front of a judge, and he hears their words and judges between them.
What is the meaning of "Mi Yispalel Lo"?
Radak: Who will enter the judgment for him with Hashem?!
Radak based on Targum Yonasan: Who will pray for him, and [Hashem] will pardon him?!
Why did Hashem want to kill them? "Lo Achpotz b'Mos ha'Mes" (Yechezkel 18:32)!
Rashi: Their verdict was already sealed. Before the verdict, "Lo Achpotz
Tosfos (Nidah 70b) attributes this answer to Sifri. Our text of Sifri (Nasa 42) is like the Gemara (refer to 2:25:4:2).
Malbim: I.e. Hashem will not help him to repent, to arouse his heart and tilt him to the good. He will leave him totally to his choice. Had Eli's rebuke been before the decree, Hashem would have helped them to heed it.
