[Mad Dawg]

I think maybe not exactly. A heretic, by definition, picks and chooses, and errs in omission or in over-emphasis of some point or points. So you gotta be CLOSE but wrong on this or that. A Buddhist is not a heretic, in this use of the term. He's an infidel. A Muslim just barely is because he claims to worship the God of Abraham, Isaac, and Jacob, as we also claim, but he has a VERY different view of that God, not to mention of His Son.

And of course, from our POV, the holding of different opinions by different groups does not mean that none of the opinions is true.

[caseinpoint]

Perhaps I painted the concept of heretic too broadly as you indicate. My main point, though, is that the term “heretic” is a measurement of sorts or a comparison with some standard, and the issue is who or what sets up the standard on which the measurement is made? I assume every faith has its own measuring stick and who is or who is not a heretic (or an infidel) depends on which measuring stick is applied.