Allowing the nazi voices definitely did. And while that dude isn't the judge of what is toxic, a majority of people are.
I don't know what you personally want to call it when someone posts condolences about a tragedy or massacre killing many people in their home country, and the nazis pop up to reply "you're next, [racial slur omitted]". Pretty sure most people would call that toxic, so it's toxic, even if a small minority of people disagree.