I feel deep sympathy for these two people’s loss. I grieve for them. But their blaming an innocent person for defending their self? No, Zendo Deb is having none of it
They didn’t think that the clerk should have defended himself from an armed robber. Who just happened to be their brother.
What would they have the man do? Die? Watch others die? Sorry but pointing a firearm at innocent people is a lethal threat, and engaging in such behavior can very well cost you your life. Their anger should be towards their brother.