You just have to realize that a thread similar to this gets posted every day, sometimes twice a day, and often by people who chastise others for not signing.
An op-ed is an attempt to educate other people who might read the op-ed. A letter to a congressman, if combined with thousands of others, has been shown to influence their vote. I’ve seen the NRA convert votes in the house and senate, and I’ve seen other groups also get politicians to sway their way, so giving money to organizations seems also to be useful.
I don’t oppose resistance, I just don’t find useless resistance useful, nor am I a fan of “sending a message” by calling for actions we oppose in the hopes that people will notice the irony.
Any resistance to evil is useful.