What is the line between sarcasm and thoughtless hostility?

[NikolaiI]

What is the line between sarcasm and thoughtless and unyielding hostility?

And could thoughtless, unyielding hostility be called a milder form of hate?

[Paulclem]

I think you're right. There's no need, and it does stifle discussion.

[NikolaiI]

Thanks

That's what I thought, that it stifles discussion.

[papayahed]

What is the line between sarcasm and thoughtless and unyielding hostility?

This smiley:

[Whifflingpin]

I'm witty, you're sarcastic, he's thoughtlessly hostile.

[sixsmith]

Being right.

[MarkBastable]

I tend to agree with sixsmith. Maybe there's a clue in the question. Would the question mean the same thing if it were, "What's the difference between thoughtful hostility and thoughtless hostility?"