1)
Why does it say "Tachlis Sin'ah Seneisim"?
1.
Radak: I cannot hate them more. The matter is repeated [from verse 21] to strengthen it.
2.
Malbim: I hated them to the point that they became my enemies. An enemy is worse than a hater; he seeks the evil of the one that he hates. So they seek to harm me.
