At a minimum, it's a personal attack, which is against the site rules. It's also off-topic, in a way that's likely to hijack the thread.
But, yes, the negative emotional charge in that short a post is getting pretty close to flamewar.
OK I see your points, still, a personal opinion (he disgusted me) is not an attack. The real world is not off topic. And using violent words like "hijack" to describe an online conversation seems to me inadequate.