I will try explain where I don't agree with it, by giving an example of it. You can choose the label you find fitting.
So the self proclaimed libertarian friend who I have referred to is a friend offline not on a messageboard.
Here is an example: He believes that women should not be in the work force, if he had his way he would never hire a woman and would encourage anyone he did business with not to hire women. ( how he would encourage is, networking, if someone did business with women or employed them he would cut off doing business with them and he would get others to do the same )
He has stated that women are inferior, his premise is that men can do everything a woman can and more, he gave lengthy examples as to why he believes it.
Now to me, every human being has a right to purchase from anyone who is selling a product in public.
If you are open for business you are open for everyones business.
Now in your own private home (private property) do what you want.
To me as humans our private life is just that private but our public interactions have some ground rules so as to not separate each other into an unequal category.