Vitriolic - really ? Sorry but I just cant think of what else i would call ignorance.
Why call it anything? Simply responding with a clearly articulated, contrary opinion is more than enough. I agree with your opinion on the matter, however.
probably you're right. I could have left out the ignorance part. But in the last couple of weeks, this is the 4th instance where I read someone just jumping to some conclusion and making a rash judgement about something that they have no experience about. I refrained from commenting the earlier 3 times, but this time, it just really irked me.