Why did it take so long for outrage to build to the point of rioting, looting and damaging monuments indiscriminately? Affirmative action in the form of peaceful protest and/or civil disobedience, being the most effective means of pushing for change, should have resolved the issue decades ago, removing what should be removed
This appears to be an almost perfect argument against your position. Perhaps you should think about it some more.
What you and others appear to be saying is
people felt like this for decades and nothing changed.
Well, let's explore that. Did a 'very clear majority', for decades, feel that way about the statues being scuttled? I don't think that's the case at all. In fact, I don't think a very clear majority supports it
right now. In fact, I don't even think
some of the people in the mob who are doing the tearing down necessarily thought, say six months ago, that it needed to be got rid of.
If a majority felt for decades that these particular statues should come down,
they would have come down. There was no barrier except the will of the people, and the will of the people was
simply not there. Nearly as soon as there was a majority of people in Australia who wanted same-sex marriage, we got it. People had not wanted it 'for decades'. Same sex marriage went from politically unthinkable to political reality in only a few years. If a majority of people in Australia had supported same sex marriage in the 1970s, it would have happened by 1980.
If there is really a 'very clear majority' that wants these statues removed, no city council could resist it. If that majority has come to be formed very recently (and I don't believe there is evidence of a majority), then cities will respond. And if there is not a majority,
if the majority think a particular statue should stay, then it should stay.