The danger is
always moral superiority. When you believe that your cause is
so just, it justifies unjust means.
Left, right, TRA, MRA, hell, even feminists - we are all susceptible to this, which is the essence of purges and purity spirals ad infinitum.
The minute you lose sight of the fact that your opinion could be wrong and that you are no more inherently righteous than anyone else, when you base your life on ideologies rather than material, provable reality, you become a mark for the next totalitarian wave.
In this context, humility and a strong commitment to scrutinizing your conclusions is vital if you want to avoid that. It's one of the reasons there are a number of threads here where women ask 'Do you ever think you got this wrong?' and why I welcome that - because we're asking ourselves hard questions, revisiting the foundations to see if they still hold. Once we stop doing that and begin parroting slogans without connection to the factual realities that underpin them, we've lost our footing.