system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] Why didn't the 30th century Federation do anything about the events referred to in the Star Trek reboot?

My question was to wordy too ask properly in the title so here goes: The series Star Trek: Enterprise introduced the Temporal Cold War. One of the main agents involved in the war was the Federation of the 30th century which had access to time travel and monitoring technology and which actively took steps to make sure that the timeline remained as recorded in history. 

I haven't watched the series entirely but it seems to me that a body with such technology and interests would seriously want to prevent the massively time altering events in J.J Abrams Star Trek reboot series.
gpt
It's outside of their jurisdiction.

The wormhole that opened up due to the supernova collapsing in on itself wasn't just a portal in time.  It actually opened up a portal to the past in a very similar alternate dimension.  (Note that we've known about other alternate dimensions for quite a while now, so this new one isn't really a surprise.)

We know this for two reasons:

* There are certain minor inconsistencies between our universe and this other one that existed even before the Narada's appearance.  For instance, Federation ships are much larger.
* Spock himself had no protection from changes to the timeline.  If Vulcan was destroyed in his own timeline, his past would have been altered, which would have altered his memories as well.  This didn't happen.

Now, as for why the 30th century Federation from *that* dimension didn't intervene, there are a few possibilities:

* Perhaps the Narada and the destruction of Vulcan were already an integral part of their timeline.
* Perhaps they lost the temporal cold war and are no longer able to alter the past.
* Perhaps the destruction of Vulcan altered time in an unpredictable way that puts them in a better position than they were originally in.