He was a European who mercilessly exploited the native peoples and the environment to his own ends.
Definitely friend, if we altered history just that slight bit then the concequences and subsequent expansion of British dominion would never have happened. And if that never occured then the liberal democratic model born from the American revolution may never have developed fully.
But this in itself does not say that Columbus wasn't a man of his times who did things that by todays standards would be considered criminal.