Starts out ok

It begins interesting enough but by the end a black group of militant "freedom fighters", never before introduced, arrive on the scene, while it drops or kills off previous characters.
(Spoilers)
This group is communist, segregationist and hates whites but will grudgingly work with them briefly while they save the day against the Japanese. Afterward they tear down everything that pertains to the past and what they see as the white world. Including the Statue of Liberty.

It was a diverse show, with minorities and gays and whites all in the same boat, but then
morphed into a very divisive show. It could've been a show about bringing people together but instead decides to tear them apart.