Well, you should care. That Christ is the brother of Satan is one of your doctrines.
We are all children of God. Including Jesus and Satan. Satan rebelled and was cast out. So your post, while technically true, was misleading.
It is? Since when? How do you know that too? Amazing.
“Well, you should care. That Christ is the brother of Satan is one of your doctrines.”
There’s always a bad apple in every family. What’s the big deal?