But you cannot state that people are "welcome to engage and debate the idea on its merits" when that clearly isn't the case.
I really didn't think that part had to be stated explicitly; I genuinely don't know why someone not invested in Zig would even feel the need to go debate on the Zig issue tracker. But even setting that aside, this is far from the first time that the core team has made it clear that we don't want the internet peanut gallery to brigade the issue tracker.
as evidenced by real comments being deleted from that issue.
Which real comments were deleted?