No. We have this debate every time. I think anyone who advocates for a moral duty to breed a certain way to preserve racial purity is a racist, because they're obviously doing it for racist reasons. This is quite literally what white supremacists believe IRL - that the white "race" is being diluted. Every elf has the right to determine - for themselves - whether they think the identity of being an elf, culturally or racially, has any value worth preserving in the future. Anyone who advocates for a moral duty to interbreed is just advocating for racism.
There's no Dalish view on this as far as I know - it would certainly be racist if they thought that elves had a moral imperative to breed more elves, but there's no evidence they believe that sort of nonsense (see e.g. Merrill). The only time you and I talked about this as far as I can recall is in the context of the Dales closing their border to maintain a racially pure utopia, which is obviously racist.
I will have to disagree with you on this. White people IRL are not Theodosian Elves. If Whites reproduce with people of other races and skin color, the resulting offspring is still Human and their skin color depends on the gene sets they inherited from their parents which gets expressed.
However, Theodosian Elves are not like this. If Theodosian Elves reproduce with Humans, the resulting offspring is a Human, not an Elf. In essence, the Theodosian Elves are being diminished and if the trend continues, given enough time, they would be wiped out due to the reproductive choices they made.
Furthermore, the differences within Whites and non-White IRL is down to skin color and other differences such as physical fitness or IQ levels, both of which can be improved by genetic engineering, steroids, proper diet and healthy lifestyle. Otherwise, the body parts are all the same.
By contrast, you cannot make the Human child that is born from a Theodosian Human - Elven union, Elfy. You cannot make the child have Elf ears, you cannot make the child have eyes that can see exceptionally well in the dark, you cannot give them hardy feet that allow them to traverse grounds without the need for proper footwear, you cannot make them specially in-tune with the Fade and you cannot make them respond well to things such as the Crossroads. No amount of diet or healthy lifestyle will allow for any of this and as we know, Thedas does not have access to genetic engineering.
My point is that Theodosian Human - Elven reproduction mechanics is biased in favor of Humans and this would naturally make said Theodosian Elves be antagonistic towards Humans on some level and it should not be surprising if Elven communities such as the Dalish push forward that notion that Elves should not breed with non-Elves because if they do, they will be, as a species, eventually wiped out.
On the other hand, people IRL, regardless of their skin color and minor differences in athletic capabilities or IQ levels, are all Humans. We are all H*mo Sapiens Sapiens. If we were to classify Theodosian Humans and Theodosian Elves, scientifically, we would not classify them under one name. Theodosian Humans and Theodosian Elves are more akin to H*mo Neanderthalensis and H*mo Sapiens Sapiens.
Additionally, I would also not be surprised if you espouse the exact view Lobsel espouses if, say, Thedosian Humans breed with Qunari, the offspring of that union will always be Qunari. Theodosian Humans would respond to this by labeling the Qunari with foul names and heavily ostracizing Humans that get involved with a Qunari.
FFS Bioware, why the hell is the word H*mo censored ?! Pathetic politically correct Canadians.