1)
What is the meaning of "Aso"?
1.
Rashi: It is an expression of doing.
2)
Why will they do this to you?
1.
Radak: It is punishment for your sin of Zenus.
2.
Malbim: (a) You were Mezanah (sought) Goyim; you descended to Egypt for help, and did not rely on Hashem. (b) You became Tamei through their idols ? you served idolatry like them, and did like their abominations. (c) Refer to 23:31:1:1.