So here's an interesting WI scenario- what if Jamaat al Muslimeen's coup attempt had been successful? Let's say that, ITTL, the Muslimeen insurgents at the Red House give PM Robinson his thorough beat-down, and shoot him in the leg, before putting him on the phone, and he orders the army and police to stand down instead, with the ensuing negotiations eventually resulting in the army and police agreeing to accept Yasin Abu Bakr's coup...
First, Robinson's order is illegal. I don't know anything about Trinidadian law, but I would still guarantee that there is no provision for the Prime Minister to order the police and armed forces to cooperate with criminals; I am also sure there is provision for the government to ignore orders issued by the PM under duress.
Second, why on earth would army and police commanders "[agree] to accept Yasin Abu Bakr's coup..."? They aren't Moslems. Only about 5% of Trinidadians are Moslems, so maybe one or two of the senior officers are Moslems. (And even those would be conventional Moslems, not fanatics.) Why would the commanders agree to enforce the rule of a Moslem terrorist?