I will continue to insult Xians as long as they continue to tell me how to live my life because they have «faith» (whatever THAT word means) in an invisible sky daddy.
Also, I'm sure you mean it as an insult when you say «Xians» instead of Christians, but actually the «X» in things like «X-mas» comes from the Greek letter «chi» (Which is an X) and stands for Christ.