Is this recent incident with Garry connected at all with the antisemetic postcards delivered last year? I haven't been following this and thus don't know what Garry's issue with the supervisors is.
If not: This is scummy writing to connect his admittedly poor-taste comments to something worse.
Being Jewish isn’t some sort of shield that gives you special rights over anyone else.
This does have to be included as a possible contributing factor to this death threat.
(There's 2 types of bigots: one type will plainly use terrible language up front to let everyone know what they think. The other type will couch their hate in plausible deniable language so you're really not 100% sure.)