He could not be.
He was not a Buddha, nor did he have a heart made of stone.
Of course, he wasn't an Asura or a madman either, so it wasn't like he would recklessly charge ahead without fully understanding the situation and his own limits. He was just an ordinary person in essence, feeling emotions and anger and joy. If someone he didn't like was suffering, he would smile for a bit, and if someone he liked was wronged, he would feel angry on their behalf.
