[thomassmith65]

These are moral arguments, not the kind of arguments that we can settle by a mathematical proof.

Typically it's not that sound arguments shape our moral positions, but that our moral positions determine what we consider sound arguments.

[thomassmith65]

Upon reading this the next day, I realize it could use a concrete example:

  "We should pass a law to strip all legal rights from, and enslave, everyone who is of [pick some minority group]. Neither I, nor most people, belong to that minority, so most of us will benefit from this slave labor."

That's a logical argument. Thankfully, most people today would find it morally repugnant and unacceptable.