1)
Why did he ask if he knows why he came?
1.
Malbim: I did not come only for the matter that you fasted for.
2)
What is the significance of fighting Sar Paras, and Sar Yavan comes?
1.
Rashi: I know that I can defeat Sar Paras. However, I know that when the time of Malchus Antiyochus will come, I will leave 1 and he will enter, 34 years after Binyan ha'Bayis. Alexandrus Mukdon will reign. Even though Yisrael were subjugated to the kings of Paras at the time, it was easy work. They did not place a heavy yoke on them; Hashem caused them to have mercy on them. Malchus Antiyochus put a heavy yoke on them.
1
Malbim: I will not be able to influence Sar Yavan to have mercy on Yisrael.
