How is bringing GrapheneOS in personal?

Legit question, from a clueless person. Please be gentle! :)

Because the gp comment is not about grapheneos, but its creator and could be taken as insulting (considering none of them is likely to be actually schizophrene).

Oh ok I wasn't aware. I don't follow the Android scene and didn't know GrapheneOS was mostly a one-man show.

Calling a person schizophrenic publicly is an insult, especially in an unrelated debate.

There's a few things to unpack here from my point-of-view.

First, I didn't see him calling any person schizophrenic. I don't follow the Android scene so to me GrapheneOS seems like an organisation rather than a person.

Second, he said borderline schizo.

Third, why is it an insult?