Yes, allegorically, symbolically, he may have represented those things -- of course, one could say that those feelings were encapsulated within Magneto's idealisms and something any regular person could decipher without the Angel character.
His character was horribly constructed. He began great (his scene with his father) but he got literally no development past that. Why was he hesitant towards taking the cure? Because it was "what [his father wanted]?" Bull****. That's the lamest excuse I've ever heard, albeit entirely predictable (so much that my two friends in the theater actually said that bit outloud before Angel even said it, making a group around us laugh). We get a little itty bitty scene at the beginning, and wham, he's refusing the cure and off he goes.
Then, we don't see him until he arrives at the mansion, and then not again until he saves his Dad from those baddie muties. C'mon, for the love of god. His purpose was practically nonexistant. Why didn't he join the team at the end? Why didn't he have a voice for his own opinions? We only could allude to his position, everything else that you described it basically an opinion of you and not really an opinion of the character. We have no idea how Angel felt during the film, besided shown hesitancy towards the cure.
His deletion from the film didn't effect the story at all. You could easily have gotten that same metaphorical reasoning from Rogue, who had similiar issues with the cure. Angel was not neccessary.