Why don’t you resign from your post in protest?
“Subverting the Dominant Paradigm” and “Speaking Truth to Power” can be a lot more rewarding than merely resigning in protest.
I actually considered saying I’d gladly let the Greenies take over the April issue as guest editors. but then I thought, No. I want to have a hand in this: specifically, an editor’s hand. It doesn’t make any sense for me to forego the opportunity to choose (and unchoose) what we publish as I see fit. After all, it’s my job.
That is the exactly wrong thing to do.