*SPOILERS*... sort of.... you should have played this one by now.
Do the events found in the scroll change your view of the Dalish, the Chantry, or the Dales?
Yeah, it did. I thought the so-called "Attack on Red Crossing" was just Chantry propaganda made up to justify retaking the Dales and re-subjugating elves.
I was a little disappointed that it was based on truth, but I glad to learn that the elves didn't deliberately, maliciously set out to launch a pre-meditated massacre on poor, innocent widdle hoomins. It was a misunderstanding fueled from centuries of mistrust on both sides. (If both sides weren't so jumpy and paranoid from centuries of petty border skirmishes, and didn't instantly assume that every human/elf coming toward them was there to kill them, and didn't blindly attack every person they saw from the other side, the whole damn thing could have been avoided.)
I'm indifferent about who should get the scroll in the end. If you give it to the Dalish, it's one clan (If you can call 4 people a clan?) with another story the others won't have. If you give it to the Chantry the story can spread wider and faster, but as far as the Dalish would be concerned, it's just more Shem' lies.
I'd rather give it to the Dalish. They're much more honest, humble, and contrite about it.
Before this game, the Dalish flat-out didn't believe Red Crossing happened. Tell them the Chantry said so, they dismissed it as, "History is written by the winners, so of course they'll say we did this to justify what they did." Bring them this letter though? They instantly honor it as a treasured relic of their past, and try to learn from it. They send a mourning halla (sacred to their culture) to present-day Red Crossing as an apology and an attempt to build bridges.
Give it to the Chantry, though, and the Chantry uses it to promote yet more overtly pro-Andrastian, pro-human, anti-elf propaganda. They spread "the word" that the letter is yet more proof that their poor Andrastian ancestors were cruelly persecuted for their beliefs by those wicked elves, and that a poor elven man who clearly saw the light and clearly wished to convert to the One True Religion (which he didn't--the letter clearly states that he didn't believe in any gods and just pretended to convert so the village of the human woman he loved would allow them to marry) was murdered by his fellows for daring to come to the right side (which he wasn't, he was killed by the human villagers who assumed he'd murdered his beloved when they saw him mourning over her body), and then those wild, wicked, savage, heathen elves deliberately launched a pre-medicated attack and cruelly slaughtered hundreds of innocent little martyrs to please their wretched false gods!
BARF.
I'd rather give the account to people who'll try to learn from it and use the information constructively (like reach out to and try to make amends with those their ancestors wronged to broker more peace and understanding from both sides) than to a bunch of deluded history-revisionists (who already have a track-record of rewriting history to serve their own ends, like striking Shartan from the Canticles of Light or rewriting the elven mage Ameridan into a non-magic human) who just want to use it to promote yet more pro-Chantry, pro-human, anti-Dales, anti-elf propaganda.