Exactly where is that written in scripture? I read that idolotry and cross-dressing, sorcery and witchcraft and homosexual behavior are abominations to the Lord. I read that "There are six things which the LORD hates, yes, seven which are an abomination to Him: haughty eyes, a lying tongue, and hands that shed innocent blood, a heart that devises wicked plans, feet that run rapidly to evil, a false witness {who} utters lies, and one who spreads strife among brothers," but nowhere do I read that music of any sort is an abomination to the Lord. Quite the contrary.
Make a joyful noise unto the LORD, all the earth: make a loud noise, and rejoice, and sing praise. (Ps. 98:4)
And David and all the house of Israel played before the LORD on all manner of instruments made of fir wood, even on harps, and on psalteries, and on timbrels, and on cornets, and on cymbals. (2 Sam. 6:5)
But, to be quite serious, hootenanny Masses are theologically and traditionally unsupported, for numerous reasons. 1. They bring the rock beat (4/4) into church where it doesn't belong - that is music for dancing and partying, not for church. It distracts worshippers from the celebration of the Eucharist (you know, that "can't keep my feet still" thing). 2. The music is banal and unworthy of a solemn celebration. The purpose of a Catholic Mass is not to be a revival or a "praise service," but to commemorate the Lord's Sacrifice. We are directed to celebrate "with all solemnity" and music worthy of the occasion, such as Gregorian chant, polyphony, etc. 3. The words of such songs generally distract the worshipper's attention from the Sacrifice. If you actually read them, you'll see they're full of references to "me", "I", "mine" and concentrate on the worshipper's personal experience of religion, not God on the altar.
That's perfectly o.k. for, say, a Baptist service where the focus is on the sermon and the worshippers' response thereto . . . but not for Mass. A Catholic Mass is different from an evangelical praise service, and it OUGHT to be different (otherwise why bother?) No reason the kids can't hold a praise service if they want one, but not at Mass.
Well, what about goshawful? The worst thing about most church musicians is that they can't even stick to a few favorites that the congregation can sing. They are easily bored, and must have new stuff out there.