A friend of mine was saying that "harassment" and "discrimination" had a moving meaning. Perhaps so in the courts, but I can tell you a simple way for you to tell if you're harassing or discriminating against someone: If you really wouldn't mind if you were treated in the exact same fashion as you're treating that person, then the odds are good you are behaving in a decent manner. But if you wouldn't like it, then the odds are good that you're being a jerk. Cut it out.
This is just another way of saying what Jesus said in the Gospel of Mark, Chapter 12. Pay particular attention to verse 31.
"28 And one of the scribes came, and having heard them reasoning together, and perceiving that he had answered them well, asked him, Which is the first commandment of all?
"29 And Jesus answered him, The first of all the commandments is, Hear, O Israel; The Lord our God is one Lord:
"30 And thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength: this is the first commandment.
"31 And the second is like, namely this, Thou shalt love thy neighbour as thyself. There is none other commandment greater than these."