You should try it sometime: look at the readings for any given Sunday or weekday and find the verses that are skipped. Most of the time, it's all about clobbering enemies. I'm currently working on a devotional for Living Faith , and one of the possibilities is Psalm 149. The text that will be used as the responsorial psalm that day is Ps. 146: 1-6, 9. All sorts of good stuff about praising God. So what's left out? What's in verses 7 and 8, anyway?
And let the two edged swords be in their hands:to execute vengeance on the nations, punishments on the peoples;
To bind their kings with chains, their nobles with fetters of iron;