Yes but there are limits. KT's brother in law doesn't take care of his mother like he should. He's left that responsibility to KT and his wife. At the same time this BIL is being told that KT and wife show the characteristics of satan and don't care for "victims of calamity" a per the latest Watchtower.
Meanwhile dear BIL is off serving where the need is greater, the sun is shining and the wine flowing - spain. So I can understand KT's frustration with this situation.
KT. Why don't you have a frank discussion with your BIL and make your feelings known? Then if BIL agrees with the latest Watchtower poison, you are perfectly entitled to refuse him entry on your property.