Instead of removing comments like that, perhaps correct them by providing more accurate information. I read the original comments, and they really weren't toxic in any way (in my opinion), they were just strongly worded opinions.

The stated reason in the mod log was (just pulling one, the rest were very similar):

reason: GrapheneOS propaganda posting (fearmongering that it is the only mobile privacy/security solution)

Nothing in the post violated instance or community rules, at least according to my read. Here are the community rules as of this writing:

• Posting a link to a website containing tracking isn’t great, if contents of the website are behind a paywall maybe copy them into the post
• Don’t promote proprietary software
• Try to keep things on topic
• If you have a question, please try searching for previous discussions, maybe it has already been answered
• Reposts are fine, but should have at least a couple of weeks in between so that the post can reach a new audience
• Be nice :)

And instance rules:

1. No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
2. Be respectful, especially when disagreeing. Everyone should feel welcome here.
3. No porn.
4. No Ads / Spamming.

If there's a rule that's being enforced, ideally it would be posted in the sidebar.

As for the original claim, the Pixel is the only phone listed on privateguides.org (GrapheneOS and DivestOS are the only listed ROMs), which I think is a pretty well-respected and well-run privacy recommendation website. If those recommendations are not available in your area or doesn't meet your needs, yeah, by all means use whatever is available and meets your needs.

Perhaps there should be a no-dogma rule or something, my point is just that removing stuff without apparent rule violations is not great from a user's perspective.