Hey, the show did that, implicitly. "Future's End" showed a TIC officer attempting to destroy a starship on suspicion of its involvement in a disaster, guilty until proven innocent, with no attempt at due process. "Relativity" showed the TIC blithely punishing a man for a crime he hadn't yet committed. Those are both gross miscarriages of justice, horrific abuses of civil rights. The show may have ignored the ethical implications of what it established because its writers were more interested in temporal weirdness, but the bottom line is that an organization that would allow such practices has some serious problems with its morality. All I did was confront what the show implied but glossed over.
Besides, it's logical that the Federation would lose its way from time to time over the grand sweep of history. No society is static and unchanging, and even the best societies have periods where they lose track of their ideals and fall prey to corruption. We've seen how close the Federation came to abandoning its ideals under the strain of the Dominion War, how enticing the "ends justify the means" philosophy was in the face of that threat. Given the even more profound existential threat of the Temporal Cold War, it's not unreasonable that a Federation or Starfleet time agency in the future might suffer a similar erosion of principles, in the sincere belief that the magnitude of the threat they faced justified such extreme measures. (But "fascist state" is an exaggeration, since I only established that this was true of the TIC, not the broader Federation of their era.)
But at the same time, I established that it doesn't last -- that eventually the TIC is replaced with a more ethical agency. So the overall optimism of the Trek universe -- combined with its realistic recognition that sometimes things get worse before they get better and eternal vigilance is the price of freedom -- remains intact.
Yeah. It was a neat trick. I just finished rewatching Star Trek '09 and I was thinking of how cool it would have been if that had occurred with the two Spocks. Then again, maybe they were better off as separate.
Those two Spocks were 129 years apart in age, and would've had few actual particles in common anymore, not to mention the larger-scale differences between their physiologies as a result of the aging process. Indeed, since Spock Prime died and was regenerated on Genesis, he probably doesn't have any of his original subatomic particles anymore. So the two Spocks aren't the same physical entity on a quantum level, and thus their bodies couldn't be reintegrated through the process I described. (Yes, in "Relativity," Braxton was integrated with an older version of himself, and implicitly the same happened after "Future's End," since the Braxton seen at the end of that episode had no memory of his stranding on Earth but the one in "Relativity" did -- implying that Crazy Street Person Braxton was retrieved and reintegrated with his alternate self. But that's a difference of only a few decades, so there'd still be a fair number of shared particles, especially in parts of the body where cells aren't periodically replaced, such as the brain. It's a myth that the body undergoes a complete turnover of cells every seven years.)