We've been through these arguments since the 1940s. Karl Popper's view of the Paradox of Tolerance [1]
>Less well known is the paradox of tolerance: Unlimited tolerance must lead to the disappearance of tolerance. If we extend unlimited tolerance even to those who are intolerant, if we are not prepared to defend a tolerant society against the onslaught of the intolerant, then the tolerant will be destroyed, and tolerance with them.
If we want an open society that permits maximal freedom, we can not permit those who wish to destroy freedom to override those who wish for freedom. The white nationalist movement includes people who explicitly endorse fascism and "throwing into ovens" those who exercised their free speech. [2]
Stop defending this evil.
[1] https://en.wikipedia.org/wiki/Paradox_of_tolerance
[2] http://www.inforum.com/opinion/letters/4311880-letter-family...