The person's religion is irrelevant.
If someone was holding a knife to ohioWfan's throat, then yes, I would be happy to pick up that gun and blast the crap out of him (or her), if it became apparent that there was no way to prevent bodily harm from being inflicted upon ohioWfan without causing bodily harm to the person holding the knife.
Determining where that line is--i.e., when any attempts to get that person holding the knife to back down--a pure judgement call.
“The person’s religion is irrelevant...”
How about “Nazi Trash”, or “Commie trash” then?
Enemy du jure (jour?), brother. You got my point.