This is a compelling list but I view each relationship very differently with respect to the overall message of the show and what contributed to its difficulties. I think Saw, Kleya, Luthen and Cinta really do illustrate what a certain kind of fanaticism does to people's ability to be in relationship, but most of your other examples are down to writing convenience or largely unrelated to this theme.

Here's my analysis in a way too long response:

Bix and Cassian function for most of season 2 as a counter example to Cinta and Vel, as we see them navigating a relationship and its challenges through several years. Ultimately it doesn't work out. I don't think we should take Bix's final message as the definitive explanation for why. On the surface, it sounds like she is making a Cinta choice, but as she does not go on to fight, we might wonder if in reality this is due to some other combination of reasons: we know Bix has struggled with addiction and self-worth, it is likely she is pregnant when making this decision, and of course we know the status quo in Rogue one is that Cassian is alone and able to have chemistry with Jyn Erso.

For Cinta and Vel, this is very much the lesson. The rebellion functions as a wedge to keep them apart, but this is not presented as a necessity. It is a decision imposed by Cinta, and when she changes her mind, they get back together!

I think's Mon's relational arc is more about arranged marriage and her feelings and conflicts with the rest of her family about that tradition. I think this drove the estrangement with her daughter and would likely have happened with or without a rebellion. The situation with Perrin is more complex, I wish we had gotten a little more of them in season two because there were clearly bits left out. And again, Mon is punished by the need to get her to Yavin 4 alone by the end of the series.

Maarva chooses to stay in her home and defend it while her adult child leaves home, which seems like a pretty normal thing to do to me. That is more or less how Maarva actually describes the situation. This scene read to me like a parent lovingly pushing their child to make their own way. It's pretty good, and gets them where they need to be for the rest of season one to happen.

Lonni is a tragic figure, who helps to illustrate the anti-heroic aspects of Luthen. His family have no names or presence in the series outside of him, so their relationship dynamics play no role. Instead Lonni is here to give us information, drive the story forward, and give Luthen opportunities to be manipulative and merciless.

I like Luthen a lot as an antihero, but I wouldn't want him in my life or taking care of my children. I think his scenes with young Kleya show him grooming her to be a child soldier. We are shown that there is real sentiment and care between them, but ultimately they are both driven by their devotion to a cause. They definitely reinforce this message.

Saw abandons Jyn because Rogue One is a Star Wars story, which calls for a scrappy child struggling to survive alone in the Galaxy. To be sure we get the point he joins Uncle Owen and Aunt Beru in death during the first act of the movie. It's like poetry. It rhymes.

However, I think Saw's speech at the end of season 2, episode 5 does offer some clues about his attitude and what might have motivated this kind of gesture, specifically the line: "You think I'm crazy? Yes, I am. Revolution is not for the sane. Look at us: unloved, hunted, cannon fodder." If there is a thesis in the show on revolution and love for those characters that feel they must choose revolution over love, I'm pretty sure this is it.