There have been a lot of posters recently complaining they are 'not allowed' to hold a particular view on MN, while posting said view all over MN.
Mumsnet only remove posts which clearly break very clear and I think fair guidelines, not because the person reporting disagrees with the poster.
Said guidelines are
No personal attacks
No posts that break the law, including hate speech of any kind
No trolling, misleading or deliberately inflammatory behaviour
No trollhunting
No spamming
No multiple accounts
What I can't see there is anyone being 'silenced' for any particular opinion or stance, and it's not been my user experience over many years. I've never seen any evidence of political bias amongst MNHQ staff.
AIBU to think those restrictions are perfectly reasonable and fairly enforced?