The point is, being a Christian does not mean hating or belittling the non-Christians. Being a Muslim does not mean hating or belittling the non-Muslims. Being an Atheist does not mean hating or belittling the religious people. In a civilized society, diversity in religious orientation should be the reason for celebration, not the cause for hatred and differentiation.
Cultural and religious traditions that forbid cross-cultural unions prevent peace on earth. Instead of rejoicing that our sons and daughters are heart-driven and love other humans outside of their familiar religious, social or cultural domains, we punish and insult them. This is wrong. Honor killings are not honorable by God. They are driven by ignorance and ego and nothing more. The Creator favors the man who loves over the man who hates. If you think God will punish you or your child for allowing them to marry outside of your tribe or faith, then you do not know God. Love is his religion and the light of love sees no walls. Anybody who unconditionally loves another human being for the goodness of their heart and nothing more is already on the right side of God.