I actually rather agree. Since Thedas religion and cultural factions reflect real-world ones, I relate a lot to the elves. I am from a very small minority religion that is in danger of being assimilated into the larger, mainstream Western World religion (aka Euro-centric Christianity), so I understand the elves' terror of losing their heritage, traditions, and/or cultural identity. I understand the Dalish's desire to preserve their religion, history and culture in a world where they are a fraction of a percentage of a minority, in a large hostile world that wants to convert and assimilate them at best, wipe them out at worst.
(Btw, I really hate BioWare presenting Thedas cultures that are in danger of experiencing cultural entropy as people who're backwards, stuck in the past, disconnected from the present, and needing to just give up and move on. Um, no, **** you, Bioware. If you are not part of a real culture and/or religion that is in danger of being wiped out forever, you have no right to judge people who do want to preserve everything they are in a world that wants to change them.)
Being part of a minority religion that is dying from assimilation into Christianity / modern secularism myself, I also get irritated with Andrastian human characters who try to push their Andrastian views on non-Andrastian characters (though particularly minority religions/cultures like the dwarves or Dalish elves), and the game doesn't point out how ethnocentric or insensitive they are.
Every time I see this exchange...
Cassandra: I'm curious; do you even believe in the Maker?
Lavellan: I'm Dalish. I believe in our own gods.
Cassandra: And there is not room among your gods for one more?
I think: Excuse you? Who outlawed who's religion?! "Your god" is worshiped across the corners of Thedas, but we elves have no nation, no cultural security, and no safe place of worship to call our own. We Dalish live on the run, moving from place to place, almost specifically so the worshipers of your god don't catch us and force us to convert to worshiping "your god." When was the last time an elf tried to force humans to worship elven gods? That's what I thought. We respect your right to worship whatever god you want, just as long as we can be left alone to worship our own. Why can't you show us the same courtesy?
To quote Merrill after Anders tries to force his Andrastian views on her one too many times: Your "Maker" is a story you humans use to explain to explain the world. We have our own stories. I don't need to borrow yours.
P.S. While I do like and respect Cassandra and Giselle a great deal (and many Andrastian humans, for that matter), and I know they're good people, remarkably accepting and open-minded, don't try to force the PC to see religion their way, blah blah blah, I do find it annoying that they constantly undermine a Dalish Inquisitor's faith in his/her own religion. I wouldn't even mind that so much except the game doesn't really let you call them out on it.