1)
Why is asking for him from the Urim v'Tumim considered rebellion?
1.
Rashi: We ask from them only for a king [Radak #1 - or the Av Beis Din, or someone whom the Tzibur needs - Shochar Tov 52].
2.
Radak #2: He asked you to where to flee.
2)
Why did Sha'ul change the order of what Do'eg said (that he asked from the Urim v'Tumim before he gave the sword and food)?
1.
Malbim: Do'eg needede to say that Achimelech asked first, to strengthen the slander. Sha'ul arranged Achimelech's offenses in increasing order of severity.
3)
Why did he say "ka'Yom ha'Zeh"?
1.
Malbim: Today [the rebellion] was actualized [and it became clarified retroactively].
