Zeal is neutral. It might be good or bad, but either way, it is extreme.
One can have zeal for a good cause; such zeal is good.
But zeal for the wrong cause is like driving a car fast at night without headlights. It is bound to end badly for the zealot and perhaps for others as well.
I am asking the Father to help me make sure I am pointed in the right direction. For there have certainly been times in my life when I was zealous for the wrong cause.