By hosting nazi shit Dynasty-Scans contributes to the normalization of said nazi shit and the continued treating of it as perfectly acceptable.
"Ironic" nazism is often just a cover for actual nazism, a weak cover for awful people to hide behind despite them believing many of the actual things nazis did. Even when it is not this, the normalization of ironic nazism enables this, and then when anyone takes issue just say, "It's a joke." Even tho jokes are supposed to be... you know... funny.
The reality of things is that 4chan gave nazis a place to not only be fucking nazis but to espouse their views to non-nazis, and 8chan continues in that tradition. While modern day white nationalism, nazism, white supremacists, etc cannot be attributed to sites like this alone, they are and continue to be one part of a very big problem.
Plus, the people who "pretend" they're nazis, or at least claim they're pretending, are quite often the same people I see trying to push trans women to suicide and engaging in coordinated harassment campaigns where they talk about throwing us in ovens or gassing us so quite frankly fuck "ironic" nazism and fuck "ironic" nazis.
If you're a part of that group you're part of the problem and I think you should be dealt with the same way I think all nazis should be dealt with.