Under a fascist state they would be. One of the tenets of fascism is that the state must ensure its citizens are physically, mentally, and socially healthy. Anything detrimental to the health of the nation is prohibited and removed. Fat activists would be actively pursued and persecuted by the government for advocating for an unhealthy lifestyle. HAES would never be a thing. Fatties would be publicly shamed (active, forward shaming, not the passive style our current society has), until they stopped being a disgusting animal, those that refused would be fined, jailed and possibly deported.