Yes, I agree with the quotation."Those who can make you believe absurdities can make you commit atrocities."
--Richard Dawkins
That's opinion, hardly activism.
Moreover, it's reasonable.
I don't wish to defend whether or not it qualifies as activism. My point is that this kind of idea can provoke change in society and can be used to justify change in society, even to energize it. Zealots and revolutionaries can use a quote like that to go after people with pitchforks in an armed uprising. They will chant, "how dare you influence us commit atrocities, off with your head".