I’d suspect some ‘friend or acquaintance’ knowing of your healthy ‘disbelief’ gave your name and contact info to such a diabolical organization as ‘a joke.’ I’ve had friends threaten doing the same for me.

I’ve an ol’ friend who remains a registered Republican in order to receive their political crap … to pass on to his registered Democrat wife ..to pass on to Dem HQ..

And something I’ve done in the past for such organizations as contactated you is fill their ‘postage paid return envelope’ with as much slick, heavy magazine-like paper as to resembled a brick (masking tape if necessary) - and drop it in a mailbox ...if there’s any coded tracking on the envelope, you may not receive any more solicitations; if not - you can do it again

ANSWER IT!!
I somehow got on the Trump mailing list. They send me several messages a week, loaded with propaganda, often asking me to make a donation to a slime ball who brags about how much money he has.

But about once a month, they send a survey. Sometimes it’s about various policies. Often it’s a series of “Do you agree that...” and sometimes it’s approval polls for the feuhrer. The choices to rank how he is doing “great, good, okay, and other.” They have made certain that they don’t get a number of people who say “bad.” And they are trying to o my poll supporters anyway.
I answer them all. I say what a shitty job he is doing and how his policies are terrible. I am sure I am on an “enemies” list somewhere and when the nazis come they will take me away. If it comes to that, at least I know I’m on the right side of history.
That reminds me, I was asked to sign a birthday card for the feuhrer, with my own message. I am thinking the classic “YOU SUCK.”