While the culprit being Iranian alone does not mean the Iranian government is responsible, that you preclude the Iranian government and even rogue Iranian/Hezbollah elements altogether from having a role is a bit damning.
Indian officials are saying that intelligence is pointing to Iran, and unless you believe India is an American/Israeli lapdog (while they are buying Iranian oil
) that paints a picture along with the caught suspects in Bangkok.
I'd like to think Iran's covert arm is rather more intelligent than this guy, so i'm leaning towards poorly trained rogue Iranian elements unless some more evidence comes to light. This is rather embarassing for Iran's government as they blame Israel for the attacks and the culprit in bangkok turns out to be Iranian, if not necessarily backed by the Iranian government. They got some house cleaning to do unless they are fine with throwing away some of the few relations they have left down the toilet.
False flag is tinfoil hat material until proven otherwise, the Israelis care deeply for their own, evidenced by their willingness to trade hundreds of captives for their soldier's bodies with the support of alot of the population.
Either way we will probably see more evidence come to light as this man is taken into custody.