Yes, I think it is an "issue" because we know that the RC doctrine of Transubstantiation goes much deeper than just the idea of what the bread and wine of the observance of the Lord's Supper "become" or represent. They teach that ONLY their priests can "confect" the substances and reception of them is salvific and the only way to obey the command of Jesus:
There are other views concerning the "real presence" of Jesus in the observance (i.e.; Consubstantiation, metaphor, etc.) that don't take it to that level. In the case of the RC view, it becomes a critical disagreement over the gospel of salvation. My point was that where Scripture is not exact, dogmatic statements based upon conjecture, opinion or developed dogma shouldn't be argued to the point of angry and hateful un-Christian attitudes or accusations of heresy.
To me, the core issue was not so much what the debate points were ( although they were not negligible), it was how they were presented, one side of which was not very responsive or sticking to the point.
Regarding the whole exchange, I enjoyed the chance to apply proper hermeneutics to the matter, and see what others did with it. If someone becomes angry, it is without further need to discuss that the person who is upset has made oneself that way. To blame it on someone else for one's emotional state only says that such a person has no control over their own spirit, but wants to blame others for the ill feelings.
I'm not angry or miffed. Are You? I would guess probably not. If anyone would prefer to spend more time involved in basic evangelization, I would say to do that.