I know parents should love their children, should they like them ?

I know a family. There are 2 kids, well one is 22 but still is treated as a child. The 22 and 12 year old have problems with learning and memory. The 8 year old and 14 year old are fine, but not very nice to the other two. The parents are abusive to the 22 and 12 year old and not nice to them, but treat the others like angels from my understanding. The 22 and 12 year old are also more independent and not as much as kiss asses, they want to do what they want to do without being told they can’t. They also don’t like being forced to do things like go to church and stuff. I know the 12 year old doesn’t have too much choice though.

Should their parents treat them different just because they are “different” and more independent in their minds and don’t just kiss their ass. Also should their parents like them more, it seems as though they don’t like them at all and are mean to them because of it. That is part of why they are both always at our house, plus they love us :-)