While this idea is admirable, fascist/Nazi dialogue has shown again and again that fascists are not interested in "fair" debate. All they want is a larger audience so they can pass on their views -- and look at America. Do you really think that the hundreds of thousands of people debating Richard Spencer[0], Steve Bannon[1] and Milo Yiannopoulos[2] has stopped the spread?
No! In fact, it has enabled them to spread their sources of propaganda further into the world. Now even centrist friends of mine are linking to Breitbart as if it is a valid source of information[3]. Some viruses and infections you can only kill through isolation. Fascism is one of them.
[0]: In case that you have any doubt that Spencer is a Nazi:
Instead of asking how we can make reparations for slavery, colonialism, and
Apartheid or how we can equalize academic scores and incomes, we should
instead be asking questions like, "Does human civilization actually need the
Black race?" "Is Black genocide right?" and, if it is, "What would be
the best and easiest way to dispose of them?" With starting points
like this, wisdom is sure to flourish, enlightenment to dawn.
-- Richard Spencer, "Is Black Genocide Right?" (2012)
[1]: Bannon has voiced support for UKIP and Front National. The former is an close offshoot of Britain First, one of whom murdered a British politician a year or so ago (He had a golden eagle statue and a shrine to Nazi literature). The latter was literally founded by a member of the SS, Pierre Bousquet. FN has also been known to murder French politicians. (https://rationalwiki.org/wiki/Steve_Bannon)