It does seem like the admin level is an issue when it comes to reddit and racism. This is easier to observe as there are fewer admins than users. I do want to see some kind of data to be convinced it is the majority of people on reddit. I only have my personal experience to go on. I remember fondly how conservatives bemoaned that reddit was dominated by liberals. So from my personal experience the racists were the minority. I could be wrong though, because I don’t have political census data on redditors.