Agree, even so,if the Propagators kill Rinoa and Squall, then they would be destroying themselves, and in other way Rinoa and Squall destroy them, they would destroy the team, including Rinoa and Squall, so they could'nt destroy themselves, then creating a complex paradox ending where anyone could destroy their other "selves".If the characters are the Propagators, then why do the propagators attack 'themselves' and why don't the other characters die via paradox by killing themselves?
So my questions are:
If Propagator are the characters past form, then why the characters can kill the Propagators?
If the characters are the Propagators past form, then why the Propagators can kill the characters?
these are my own answers
You have played Chrono Trigger and Chrono Cross, or maybe watched "Time's Machine" movie or read the novel? there explains all this crap over and over again, but I'll make my own theory (sorry theories's haters)
A person cannot kill himself in the past, because he would end existing, then in the future wouldn't be a himself to destroy his past himself, so the first thing then would never happen really, then there would be a complex paradox.
There could be the parallel universe, but here, if you kill yourself in past, your universe would end, the history taking another path, where there is not another you to kill your past, destroying that path too, also with all other paths, creating the end of all the times.
(I had to take a little time to understand myself, if you cannot understand too, just take your time)
Theres also the history of the original FF, where the legend the young ones hear where really themselves, but here they DIDN'T mess with his own lifes.
You cannot really change your past, but if you do, then you would already remember it
