Is it normal i refuse to break my moral code?

My family does not always respect my ethics and I refuse to break them. It has gotten me in trouble before. When my dad called my mom a bitch I defended my mom. I have to love and defend both of my parents. If my parents love me or not they are still my parents, I not going to suddenly lie about it. I have to treat them the same.

I cant love one more than the other. That is all there is to it. I cant break this rule now or else the fact my dad abandoned me would mean nothing. Every holiday I remember to get a gift for every friend and family member and loved one and never leave anyone out. Even if I mad at one of them days before I cant not buy them a gift. Since that is fair and that is proper.

I know its upsetting but am I really wrong for having a moral code? My family wants me to purposely exclude certain people in favor of them. I dont understand how you can really expect a person to do this. If it was someone outside of the family that was attacking them I would have no problem, excluding other family members and adopting new ones to replace them is just wrong.

Real family does not easily replace family. If you can replace a family member just like that you do not really love and and you never really did. Only a person who only loves them self does this, if not you stick by family PERIOD!