A parent raises a child to be honest, moral, respectful, thoughtful, and decent. When that same parent abandons those qualities by selling their soul to a man who is the opposite, the child sees it and feels lied to, betrayed.
A parent professes to be a decent Christian, following the teachings of Jesus Christ. When that same parent abandons those qualities by selling their soul to a man who is the opposite, the child sees it and feels lied to, betrayed.
Certainly no surprise. People don't like being lied to and betrayed by members of their own families. When that happens, a person now questions the very morality of that family member. That's a pain that is very difficult to hide.
This cuts at the heart at what has always been a close familial relationship. Trumpsters will scoff, belittle and dismiss all of this, and that just makes it worse for the family members.