Second, if a parent downplays the separation of Shabbos from the other six days of the week, in actuality the parent is teaching the children that complete honor of Shabbos as taught in the Torah is not required. As a result, the children learn the definition of honor from their parent's example. In return, unfortunately, the children will honor their parents in the same fashion the parents honor Shabbos. Such weak-kneed, shallow observance of Shabbos makes a very strong impression upon our children just as diligent, careful observance of Shabbos does. They are teaching their children that what G-d says can be redefined to mean something else even though that is untrue.
Children learn to redefine authority through their parents' example.
Fourth, parents that observe a corrupted form of Shabbos or Torah observance are only fooling themselves. There are many variations of stumbling blocks that parents teach their children, G-d forbid. This type of example can result in painful isolation. When children grow up they eventually learn the other side of the story. They learn that they are Jewish.