Yes, with you people it's like "Accept our position or ELSE!"
And you brow-beat anybody who disagrees with you to submission.
Actually, that has not been my experience with most INTJ's. A few have been like that, but they were generally immature, and I knew better than to keep messing with them.
The only problem is what I described above, how the INTJ is more analytical in argument, while the INFJ seems more mystical. And trust me, you simply cannot apply analytical tactics to mystical arguments; it's a completely different realm.
When you INTJs seek to tear arguments apart, to me you engage in what Chesterton called "the fine art of missing the point". You either comprehend the point or you don't; if it's necessary for you to tear it apart, then you really don't grasp the point - you missed it big time.
I'm not so sure that's the right analogy. I think it's less about mystical vs. analytical, more about accuracy vs. practicality. Ti vs. Te. If it's Fe vs. Te, that's not a debate, that's a personally-charged argument about the importance of people vs. goals.
I think what you're seeing in INTJ's is a different thought process. INTJ's are always thinking in terms of goals, what should be done, how it actually works. There's less of a "should" and more of a "how." Does that make sense? It's not as aggressive as you think, they're just not processing things in the same terms you are, and I don't think their approach is any less valid.
INTJs maybe positionied to understand the limits of logic, they still cannot going beyond those limits.
I think what they are concerned with is going beyond the limits of usefulness to the situation, not going beyond logic. They can go beyond logic when it's clear to them that logic has nothing to do with the situation.
And I admit I'm a bit hostile to INTJs lately, due to some recent incidents in my life - namely an INTJ girl breaking my heart.
I think this is the source of your whole perception about them right here. I've had bad experiences with several INFP's in debates, and it's colored my whole perception of Fi for a long time. It's taken several intelligent INFP's to help my opinion of them improve again. Sorry to hear about this. But I think that for the purposes of the point you're making about INTJ's being very vicious, this would be something of a violation of Ethos.