1)
Why does it say "Ki Nat'u Alecha Ra'ah"?
1.
Rashi: This refers to Titus, who said that he killed Hashem (when he stabbed the Paroches, and blood came out - Gitin 56b).
2.
Radak: This punishment (their memory be blotted out - verse 11) is proper for them, for they wanted to do evil to You, if they had the power.
3.
Malbim: They wanted to do evil to You in practice.
2)
What was their plot?
1.
Radak: They wanted to make war with You and do evil to You.
3)
What is the meaning of "Bal Yuchalu"?
1.
Rashi: They cannot do [their intent].
2.
Malbim: Even though they could not [do evil to You], they thought and took counsel how to do so, and were prepared to do so.