How to Tell Someone That It's Not Allowable

I think because God made us, owns us, you know, we are His. He and His wisdom knows what's best for us. And though we may not like, I personally don't understand why I can't do pork. Islam isn't about haram, it's about the mercy of God, God's forgiveness and all those things. Our age is the one to hear that, once talked about rights and pleasure... It's a different message, isn't it? We have to trust the wisdom of God who knows ... Even if we don't understand the reasons we must accept.