Well, the game at least makes the effort to make the refugees a more even moral spread. Some of them are parasites and rogues, like Aradin who turns out to be a real piece of shit, and Mol as well who even abandons her brats the moment she gets into the Guild to continue climbing her way up after all the worry those brats had for her back in Act 2 when she got kidnapped. Others are truly innocent victims of circumstance. And while the game does depict rich nobles who don't want to share, it also touches on the fact the city can't accommodate an influx of people with no available housing and a dwindling job market.
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Mol didn't abandon the children. If you talk to them in Rivington and BG, they tell you, that Mol still takes care of them. And tbh, she is in no shape or form responsible for the kids and takes care of them anyway.
I won't get into the political discussion here, it only will give me headaches, I just wanted to point that out about the story with Mol and the tiefling kids.
And as someone pointed out, Aradin is not a refugee in BG, he even says to you something along the line that he will get back to Baldurs Gate.
