i don't think this guy was isis.
remember aleppo, he shouted.
aleppo, in which the russians and syrians have perpetrated a massacre which many have indicated is a war crime. aleppo, which is just across the border from turkey.
he didn't mention mosul, which is an isis stronghold under siege. he didn't kill the other people in the room.
it sounds like an emotional response to russian military action rather than a terrorist/religious event.