1)
What is the meaning of "va'Tesimun l'Shomerei Mishmarti b'Mikdashi Lachem"?
1.
Rashi: You put in My Mikdash murderers who are not proper to guard My guarding.
2.
Radak: Those who guarded for you in the guarding of your idolatry, you appointed them to guard in My Mikdash. The prefix Lamed in l'Shomerei is [in place of Es, like] "Hargu l'Avner" (Shmuel II, 3:30), and similar verses.
3.
Malbim: You had a Mitzvah to guard the Mikdash, so Arel and Tamei will not touch. Not only did you not do so ? you sinned more, and appointed Bnei ha'Nechar to be the guards!
