Since you chose to air this publicly, I'll respond publicly. I've been removing your undemocratic "rule" addition for a few reasons.

1. We are a democratic community and as such all rules are voted upon. When you agreed to live our values, I made this post to ratify our rules. The comment I KNOW you're going to cite was posted a full week after the rules were ratified. It's wholly undemocratic and against the values of our community to just decide your rule is an exception and add it without seeking consensus. Here's a screenshot to jog your memory.

2. The rules and posting expectations already ban the behaviors exhibited by people labelled tankies. This "rule" seems to be for your ego rather than any practical reason.

3. "Mods have final say" is in regards to interpreting and enforcing the rules of our community. It does not excuse unilateral changes to the rules.

4. As the only active mod, I can tell you with absolute certainty that tankies have not been a problem in this community. The lemmy instances people point to as being tanky are banned by LW and cannot interact with the community at all. The problem I've noticed are people denying the genocide of Palestinians.

Edit: I don't have any control in how you choose to handle issues in our community, I just react the way that seems most appropriate. That being said, I do want to find a solution here. I believe we should ban the behaviors of tankies, rather than leave it up to interpretation for what's allowed. We have a few options here; I'd prefer we make a metapost on amending the rules to whether we should explicitly ban support for totalitarianism or ban tankie discourse.