First, I'd like to thank you for being polite about this, Lotion Soronnar. Your opinion of other pro-mage supporters is negative by your own admission, I would like to thank you very much for taking my arguments seriously enough to answer them logically. I appreciate it.
That said, I believe there are too many "begged questions" in your post. Your conclusions make sense if I accept the presuppositions behind them, but I believe those presuppositions could be called into question and shouldn't be taken for granted.
For example:
You argue that we have failed to achieve our goal because we still have robbery, smoking, wars, and the Darwin Award winners who get themselves killed. I would argue, however, that we've actually succeeded in our goal, since not everyone behaves like that. Given that "the average daily citizen", including yourself, does not behave like an **** 24/7, that is something I would consider an improvement to our supposedly "natural" selves.
YOU, for example, clearly don't constantly engage in unethical behavior, and you seem to have chosen to live up to moral ideals to the best extent that you can, or you wouldn't be on this forum arguing ethics with me at ALL, much less arguing that you're more ethical than I am because you support the templars instead of the mages.
You also begin from the presupposition that a) I "can't do anything about it" and

that we only have two options.
If that were the case, then obviously I would choose to support 10000 mundanes instead of 100 mages.
I don't, however, believe we only have options A and Z. We could also choose options B, C, D...
That was the point of my earlier suggestion that the Circle be modified instead of eradicated. Or was I unclear in my suggestion, sir?
It also is in fact possible to "do something about" societal injustices.
You and I are beneficiaries of people who "did something about it."
We do not currently break our backs laboring for a king eighteen hours a day, because of the rise of the middle class.
You are capable of reading everything I type, and I am capable of reading everything you type, because the Lutherans decided it wasn't fair that only the priests were capable of reading the Bible. Hence the Gutenberg printing press, the Protestants cutting out the middleman in education, etc. We are now a nation of readers, because somebody was courageous enough not to accept a priest-only-literacy-rate as "the way things had to be."
Or take the American revolution. Because people decided to do something about British overreach of power, you and I can live free of the fear that British soldiers will randomly decide to "quarter" in our homes, or that decisions that impact our lives will be made by representatives we did not elect.
So I remain unconvinced that it is not possible to "do something about" injustice, given that historical precedent leads me to the opposite conclusion.