I've never seen the image before, but the "threat of violence" was obviously a joke comment like the rallying call to "elect Biden so we can force feminize the cissy men." In case you didn't know, that's also a joke. Its very different from threats to take a vehicle (whether a truck or a steamroller) to a pride event and use it on people, for example.
If you can't understand context or jokes, maybe don't make inflammatory remarks about an entire group of people based on one person's comment with confidence without at least asking first. Nothing wrong with taking things too literally, but weaponizing your lack of understanding isn't the answer. Of course a lot of people do make veiled threats (in minecraft) when they actually are encouraging violence, so we should be careful about language and surely there's cases in the middle where it could go either way, in which case calling out the language without insinuating it was intentional or representative of a larger group could be appropriate unless there's a clear pattern...