I was early against us in Vietnam, ticked to all that by my father's concerns, some where around '62 or thereabouts. I didn't march, always being at work, later sorry about that as one massive protest happened near by my area.
On the other hand, I'm not a mob type.
The one protest I got into was years later as a Women in Black. We wore black, and stood still, as highway truckers and ordinary cars passed. Lots of good honks.
We may need that group to oomph up again.