Absalom murdered his half-brother for raping his sister. His father knew about the rape and had done nothing
about it. What was he supposed to do? If he failed to act, justice would never have
been served.
King Jeroboam brought idolatry
back to Israel. He reasoned it was better than having the people turn on him and kill him. Who blames a man for preferring life to death?
In each case the motives were at very least understandable. It was the methodology that got them in trouble.