Yeah... I think a few of us got "carried away." Myself included. (Mea culpa...)
I guess that's part of fallen human nature. The passions get worked up and reason/charity go right out the window. That being said though, I also don't think it was "over nothing." A Catholic who doesn't feel strongly about truth probably doesn't much care about/appreciate it. But of course caring is one thing. Loosing one's temper is another. It's a fine line.
But in all sincerity, perhaps the worst thing "wrong" with Four Marks, is that believing his views to be true, he was more than ready and willing to "fight to the death" about them. That, I think, is something not only a few of us struggle with. Part of being Catholic, after all, IS being willing to "go to the death" for the truth. But for some of us it's very difficult to not forget charity while we are busy being zealous for truth. (Myself included, of course.)
I have nothing against him personally. I hope he saves his soul and goes to heaven with the best of them. But sometimes people get to the point where their zeal has devoured them. And you can't really make peace with a person like that.