1)
What is the meaning of "ha'Sishpot"?
1.
Rashi: It is an expression of debate.
2.
Targum Yonasan: Dispute with them. Radak - i.e. you want to judge them in their evil - rebuke them for their evil deeds.
3.
Malbim: They came to the Navi to seek Hashem, or so the Navi will judge them based on Torah laws. Therefore, He said "Ben Adam" - if they did not come to seek Hashem, rather, for you to judge them like a [regular] person based on your knowledge of Torah, and not as a Navi.
2)
Why does it say "Es To'avas Avosam Hodi'em"?
1.
Radak: Inform them also of their fathers' abominations; they angered Me with the work of their hands.
2.
Malbim: They already veered from Torah from the days of their fathers.
