I looked through their code of conduct to see what would give you that idea, and the closest thing I could find is this:

> We will exclude you from interaction if you insult, demean or harass anyone. [...] In particular, we don't tolerate behavior that excludes people in socially marginalized groups.

Are you worried that non-marginalized groups will be harassed when contributing to Rust? Could you give some examples of harassment you worry will be tolerated when non-marginalized people do it but not when marginalized people do it?

I am worried that when non-marginalized groups are harassed, the punishment won't be as severe as harassing someone who is from a marginalized group.

I'm not the one who needs to give examples. They stated that they particularly "don't tolerate excluding people in socially marginalized groups". So, I imply that they are going to be more strict against this behavior in that specific case, otherwise there would be no use in making that point.

For example:

"We will exclude you from interaction if you insult, demean or harass anyone."

Is a perfectly understandable clause, and no further information would be needed in case they were not planning on discriminating based on the "group" that people belong to.

It's analogous to saying: "Killing is bad, it's particularly bad if the person you kill is a politician."

It implies that killing a politician is morally worse than killing someone else. If you didn't want to imply that, you would simply say "Killing is bad", which everyone can understand.