That would depend on whether you view morality as an objective principle or subjectively determined by the individual. More often than not, people justify their actions on the basis that they believe it is morally right.
Indeed. We can also point out that such people often are wrong by either their own stated moralities, or by the collective cultural morality systems by which they appeal.
Although this thread has transformed more into an evaluation of Solas's actions and similar scenarios. The question was originally posed merely, as stated, a philosophical question that came to mind as I had been contemplating Solas's scenario, and was not intended to be a direct comparison. Why did I bother asking, then? Because I am curious of others' ideology and reasoning, and, since the scenario bares some semblance to Solas's plot, I thought I would try to engage the BSN.
If i had made the post longer including every applicable factor, I doubt that anyone would have read it, rather, I would imagine that anyone whom is highly interested in the scenario would provide factors that they have individually thought of, and their stance when those factors are added to the scenario. However, if you would like me specify the factors you have listed:
They would be as contempt as anyone in any world is, so, some, but not entirely.
The past world existed in the past, and there are remnants of it left, but currently, the dystopia is the 'existing' world. They cannot move between them.
Yes, the 'old world' would be entirely as it once was.
That would, of course, depend on perspective. The comparison was between the modern world and an individual's imagined dystopia - which, the idea of a dystopia varies from person to person. As such, I would presume the dystopian world would be more 'dystopian.'
Your 'philosophical' analogy is flawed because it doesn't reflect the dynamic Solas faces. Solas is not facing time travel, his actions are not time-travel delimmas in nature, and the equivalence between time travel and Solas's intentions for the future was false from the start. Nor is the appeal to a dystopic world well-founded: the nature of a dystopic world is one in which the majority of everyone is miserable and suffering from the nature of the world. Thedas is not- or rather, not in the sense that tearing down the Fade would fix it.
Trying to see things from Solas's perspective, but then presenting a viewpoint significantly different from Solas's perspective, is an exercise in deliberate mis-direction.
Solas provides us the anologies relevant to him- burning a world filled with Tranquil. That is his perspective, and that is one any intent to see his perspective needs to look through- not trying to recast his view to something more sympathetic for the player's palat.
The relevance of his guilt is that it is a factor in his motivation, not that it affects the morality of the decision.
Although, someone may feel guilt over a situation while still believing that they are preforming the morally right action. Example: Someone whom must choose whether or not to take an individual in a vegetative state off of life support would likely feel guilt for doing so, however, it is as well likely that they believe they are doing 'the right thing.'
Again, you're presenting flawed analogies to distort Solas's position. People in vegetative states are not able to survive on their own, or hold any views of their own existence. The people of Thedas do.
The fairer analogy, more accurate to Solas, is this example: Someone who must choose whether or not to kill someone with autism would likely feel guilt for doing so, however, it is as well likely that they believe they are doing 'the right thing.'