Rashi on Psalms
a man of blood and deceit This [refers to] Esau and his descendants.
Radak on Psalms
Thou shalt destroy them that speak lies: – Thou shalt destroy them from before Thee, and so
Radak on Psalms
The bloodthirsty and deceitful man doth the Lord abhor: – for they are abhorred and despised in His eyes. And such is the idiom of the language, to speak at one time directly and at another indirectly.