Fàilte

It puts me into mind of the dragon Hraesvelgr from Final Fantasy 14. His sister Ratatoskr was murderered by mankind because they coveted her power. Their brother Nidhogg was consumed by rage for more than 1000 years and waged a bloody war against mankind, but though Hraesvelgr was similarly angry and grief stricken, he did not engage in war because he had fallen in love with a woman named Shiva. It was because of her dream that man and dragon could exist in peace that he abstained from violence. He abhorred humanity for the loss of his sister but it was his love for Shiva that stayed his hand.

I think I can now see Shadow's dislike of humanity in a similar way, like yeah, that idea is pretty good when executed correctly. He doesn't have to like them in his choice to not to slug everyone in memory of Maria. It adds a bit of edge to his choice as well which suits him. Be thankful that his love for her is so strong that it shields the rest of us from judgement.