Agreed that his ethnicity is a silly topic to be discussed, but calling Christopher Columbus a "slightly" relevant guy definitely feels like a stretch.
It's especially distasteful when it's about people who 'discovered' places, because the next step was usually the subjugation or genocide of the people already living in the discovered place. But we still celebrate the explorers as heroes.
If it were someone else, I’m certain we’d be talking about them instead.