Why didn't the Future Federation simply stop the Xindi probe/bomb?
In Season 3 they made a big story arc about the Enterprise having to go to the Expanse and stop the Xindi from making a huge bomb to wipe out humanity and somehow the Future Police of the Federation know this and they can travel thru time so why didn't they simply go back to Earth of the past before the Xindi sent their first attack and stop it before they ever got to kill those 70 million humans?
I think there might be a paradox created if they did that because then there wouldn't have been any motivation for the Federation of the 22nd century to go to the Expanse and stop the Xindi from making their second larger weapon.
Maybe though if they went and made first contact with the Xindi BEFORE the agitators from the future arrived and convinced the Xindi were going to be wiped out by humanity in the future then the whole scenario could have been avoided?
Time travel stories can be a real pain. With as often as Star Trek travels thru time though it makes you wonder how anybody knows what the "true" timeline should be.