Ben Shapiro vs Neil deGrasse Tyson: The WAR Over Transgender Issues

[The Grand Nudger]

Isn't morality mostly derived from feelings, from pain?

Non cognitivism.  Emotivism.  When we say a thing is bad, what we really mean is not about that thing, not about cultural indoctrination, not even about some cognitive opinion we hold.  Just yuck.  Thing is yuck.  

I'll be happy to answer your question:
In your above example, the focus seems to be on rape. That is the initial action. That is the problem point.
In order to stop it, you want to take an immoral action ==> punch someone.

The rape part, we can judge that it is an immoral act. it is objectively immoral.
The punching part, we would have to decide as a society if this action is acceptable. This is the subjective part.
It is similar to a sheet of glass cracking. The crack is spreading. You try to stop the crack by cutting the glass at some point. Did you make the best decision possible?

What a society accepts or demands being the truth making property is the very definition of relativism, not subjectivism.   

An objectivist is free to say that both things are bad.  We can note that society allows us to do bad things, sometimes demands that we do bad things, but that societies allowance does not make them less bad or more good.  This is a direct contradiction to metaethical and observational relativism, btw.  We can note that we sometimes find personal utility in doing bad things, or even necessity in doing bad things...but they are still bad things. A direct contradiction to subjectivism. That we sometimes find satisfaction in doing bad things, or discontent in doing good things, but they are still bad and good things as we see them. A direct contradiction to emotivism.

Ideas about moral desert and moral warrant are additional to ideas about truth making properties.