I'd say you're being uncharitable to both views.
The first view: "Everyone should be treated the same".
Having different laws for different races or ethnicities, is more unfair than treating everyone the same.
Attempts to keep racial discrimination result in people being discriminated against and killed. Even if perfect equality were not achievable, I think a more equal society is preferable to a less equal one, unless there are good things that only came with a less equal one.
The second view: "It's bad to hurt people's feelings", I'd defend with some cavea... (read more)
Are you sure of 'modus ponus' being a name for the third rule of inference?
I have seen a few names for it: