She didn't "demand". She begged you to leave all the "fanatism" back and look forward because all she saw back there scared her and it was too much to bear, hence why she begs you to forget all of this, she literally begs you to lie to her. She knows all of this she saw back there was something but doesn't want to admit it.
She wasn't even yelling at you. Even Sera herself doesn't care about religions and such (even if she claims to be an andrastian, she isn't really that devout according to her banters with Bull but apparently has issues with dalish due to her past)
Some people are closeminded when it comes to religion, that's the hard truth. I personally, if i believed in some religion and my "crush" disapproved of it, i wouldn't even pursue a rs with her to avoid all the drama.
And you know who's the ass? You (not really you but you know what i mean), if you pursue a relationship with someone who is very vocal about being against your religion (not accepting). A devout dalish inquisitor clearly can pursue a relationship with Sera, ignoring all the things she says about not liking dalish, also gets uncomfortable and is not excited at all if you flirt with her. And then you get butthurt that she doesn't approve of it in the end. That's the lesson, never go with someone who disapproves of your religion/ways of living, expecting them to "change". It doesn't work like this for some people and we have to accept it.
Sera should've been elf gated, imo.
No, I don't think going into a relationship where someone disagrees with you in an ass-move. I will agree that it is not the smartest thing to do, but it doesn't make you an ass. The Inquisitor doesn't expect Sera to change her views, only to understand that it's important to her (the Inquisitor). She doesn't expect Sera to change her opinion of the elves or her beliefs. The Inquisitor didn't get butthurt because Sera didn't agree with her or wouldn't change for her. Sera is the one who wanted the Inquisitor to change and denounce her beliefs.
Inquisitor: There is so much history there. What if it is true?
Sera: Frig. You're going elfy.
Inquisitor: What?
Sera: It's when fairy stories make your ears droop for "lost glory", but "glory" squats in the woods and smells like halla arse. I knew it was coming. Knew I shouldn't have started liking you. I said it, right? This doesn't fit. I can't fit. I'm not elfy. So, say you're kidding and we can go back to our weird-enough normal? Please, Inky?
Inquisitor: You'd really end our relationship over what I think of some ruins?
Sera: Maybe I don't believe much or understand it, but some people think too much and can bend anything to fit anything. Some things just don't it. Yes, you can explain it, and no, I won't get it. But I don't care. Some things don't fit. So, take it back. Just say you'd rather look ahead. That's all.
Inquisitor: I am sorry, Sera. But I believe this is important for our fellow elves.
Sera: And say the other bit.
Inquisitor: What?
Sera: "You'd get it if you were smarter." If you understood what it meant "to be elven". Take your elves, I'm just people.
Sera is demanding. Perhaps not in the literal sense, but she is certainly saying, "If you don't take it all back and pretend you don't feel that way, then it's over." In my opinion, as well as some other's, Sera acted completely juvenile. That being said, entering into a relationship with her as a devout dalish elf is completely moronic. It isn't that Sera isn't smart enough to understand conflicting views and opinions, it's that she is too immature to. Of course, again, this is my opinion.
My Inquisitor has never been in a relationship with Sera, but after listening to all of you who have I think there is a bit of a double standard happening. Whatever race you play Sera makes it very clear to you what she chooses to believe, so if you enter into a relationship with her being a devout believer in the Elven pantheon you should know full well that there is gong to be some conflict. Can't it be said that by you entering the relationship nevertheless is expecting her to change for you? I can understand disliking a character truly, personally I strive to be on good terms with all of my companions but there are definitely those who I can at times find aggravating (Sera included). However the all out hate for this companion in particular is something I have yet to understand. Dislike is on thing but hate is another.
Someone can have a completely different belief system as you and you can make it work. As I said, I am an example of this. Simply entering into a relationship with someone who has opposing views as you isn't expecting them to change for you. Entering into a relationship and then giving them the option to deny their belief or you'll leave them, is. Even after the break-up, if you go to Sera and tell her that you still want to be her friend, she shoots you down. It's her way or no way.
Even if you aren't in a relationship, she calls you stupid if you even consider that there is some truth in Mythal. I have friend who is Wiccan. Personally, I don't hold any belief in that, but if she said to me, "What if my belief is true?" I would never tell her, "Then you're being stupid." That is a douche thing to do. I hope that I would have enough maturity not to insult someone who disagrees with me. I don't find Sera to be a bad person, just immature. I don't hate her at all.