I’m most skeptical of coincidences.
Stone was stabbed four times in the chest so someone was definitely trying to off him. If it was an Islamist the bar fight thing could be a cover for an assassination.
The Roseburg attack by the nut could be connected to terrorism some way if he was sympathetic to radical muslims.
If the Sheriff or the Roseburg Police Chief should uncover evidence of that I’ve no doubt we’ll hear about it from them. If a fed agency should uncover evidence to that effect I’m fairly certain we won’t hear about it.
Stabs like that are not a bar fight scenario kind of stabbing.