At first, I hated the temporal cold war, but at some point I started liking it. However, it doesn't seem to make sense to me.
As I understand it, when you travel through time, either backwards or forward, you're changing the timeline only between the earliest and the latest time you were in. The timeline after that hasn't been established yet. You do change the future after that but from their perspective this incident is just a part of history. And if someone from that future travels back to undo these time travel incidents he will be changing the past and violating the temporal prime directive.
There were no future travel agents to stop Kirk or Picard from time travelling, Sisko was investigated but by agents from his time period, Janeway had visits by temporal agents from the 29th century but only when her time travel involving something from the same or later period.
Agent Daniels was from the 31st century, but all other factions in the temporal cold war were from earlier periods:
1. The Future Guy was from the 28th century. Unless the future guy was talking to the future too, his participation should be a part of history by that time, and his faction had members after the 31st century. If that was the case they would be using 31st century time travel technology, and wouldn't be trying to steal it the hard way.
2. The Sphere Builders looking at the future as of the 26th century. If that can be considered time travel (I'm not sure it could, as they had had the ability to explore all possible future timelines), they travelled only to the 26th century, and the Daniels who visited the Enterprise came from a timeline that didn't exist.
http://memory-alpha.org/wiki/Temporal_Cold_War
Everyone participating has died long before the 31st century, so it would seem that the Federation are changing the past, and there is a massive violation of the temporal prime directive.
Now, of course, there are two other possibilities:
1. Daniels was an impostor.
2. Daniels came from the future that never existed and never would have existed where they believed that their future is the one that's supposed to exist (which would be contradicted by the end of Shockwave).
As I understand it, when you travel through time, either backwards or forward, you're changing the timeline only between the earliest and the latest time you were in. The timeline after that hasn't been established yet. You do change the future after that but from their perspective this incident is just a part of history. And if someone from that future travels back to undo these time travel incidents he will be changing the past and violating the temporal prime directive.
There were no future travel agents to stop Kirk or Picard from time travelling, Sisko was investigated but by agents from his time period, Janeway had visits by temporal agents from the 29th century but only when her time travel involving something from the same or later period.
Agent Daniels was from the 31st century, but all other factions in the temporal cold war were from earlier periods:
1. The Future Guy was from the 28th century. Unless the future guy was talking to the future too, his participation should be a part of history by that time, and his faction had members after the 31st century. If that was the case they would be using 31st century time travel technology, and wouldn't be trying to steal it the hard way.
2. The Sphere Builders looking at the future as of the 26th century. If that can be considered time travel (I'm not sure it could, as they had had the ability to explore all possible future timelines), they travelled only to the 26th century, and the Daniels who visited the Enterprise came from a timeline that didn't exist.
http://memory-alpha.org/wiki/Temporal_Cold_War
Everyone participating has died long before the 31st century, so it would seem that the Federation are changing the past, and there is a massive violation of the temporal prime directive.
Now, of course, there are two other possibilities:
1. Daniels was an impostor.
2. Daniels came from the future that never existed and never would have existed where they believed that their future is the one that's supposed to exist (which would be contradicted by the end of Shockwave).