1)
What is the meaning of "ha'Sachas Zos"?
1.
Radak: For this humility, will you pardon him that he not die? He did a great sin to curse Mashi'ach Hashem!
2.
Malbim: Granted, you must pardon him for the rebellion, for the entire nation was Shogeg about this. For his sin of cursing you, he should die!