I'm no Bible scholar, but it seems to me that we are commissioned to go and preach the good news to all. The people having heard it, it is up to them and the Holy Spirit what becomes of them therafter. If the people are too blind to see and too deaf to hear, it is not up to the disciple to fix them. His(our)role is to witness and move on, if need be, rather than to cast pearls before swine and incite violence. Those who knowingly reject Christ will have a far higher power to deal with than humble pastors and missionaries. JMHO.
Check above post.