I have said it elsewhere and I think it's worth repeating here: we have to de-demonize the words "schismatic" or "heretic".
So you want to use the word in a completely different sense than the Church Fathers did, who usually attributed some type of demonic influence or degenerate ulterior motives to those who disagreed with orthodoxy? Hey, I'm all for that, have at it. 
There is demonic influence in our everyday life.When we decide "it's enough" with having pacience with someone or something, when decide that hurting someone is something inevitable in our own search of happiness.
*There is* a point in talking about such influences in our lives, or in the lives of heretics, but there is also a point in talking about them as the creatures of God that they are. There is time and place for each kind of medicine and should apply them appropriately.
If St. Paul and all the Fathers could see the good, beautiful and profitable aspects of Paganisms, which are much worse than heresis in terms of demonic influence, why can't we use the same attitude toward the heretics?