1)
What is "Mechalelecha"?
1.
Rashi: This is like "Horegecha".
2.
Malbim: Refer to 28:9:2:1.
2)
Why does it mention "Horegecha" and "Mechalelecha"?
1.
Malbim: Since they are "Horegecha" (kill you), you cannot say 'I am Elokim.' Since they are "Mechalelecha" and profane you via disgrace, this proves that you have no Divine Ru'ach. You are just a man, without any divinity.