Sforno on Exodus 2:11/ספורנו על שמות ב׳:י״א

1וירא בסבלותם. He made it his concern to take a benevolent interest in the afflictions suffered by his brethren.

2וירא איש מצרי מכה איש עברי מאחיו. He was aroused to avenge his death because of this feeling of brotherliness to the victim.