The Batista Dictatorship of Cuba established the non-Formula One Cuban Grand Prix in 1957. Fangio won the 1957 event, and had set fastest times during practice for the 1958 race. On 23 February 1958, two unmasked gunmen of Fidel Castro's 26th of July Movement entered the Hotel Lincoln in Havana and kidnapped Fangio at gunpoint. The motive was simple: By capturing the biggest name in motorsport the rebels were showing up the government and attracting worldwide publicity to their cause. But despite the shocking news spreading across the globe, President Batista would not be outdone and ordered the race to continue as usual while a crack team of police hunted down the kidnappers. They set up roadblocks at intersections, and guards were assigned to private and commercial airports and to all competing drivers.  Fangio was taken to three separate houses. His captors allowed him to listen to the race via radio, bringing a television for him to witness reports of a disastrous crash after the race concluded. In the third house, Fangio was allowed his own bedroom but became convinced that a guard was standing outside of the bedroom door at all hours. The captors talked about their revolutionary programme which Fangio had not wished to speak about as he did not have an interest in politics. Convinced that he was not in danger he went on to develop a case of Stockholm Syndrome, admitting afterwards that he sympathised with his captors' actions: "Well, this is one more adventure. If what the rebels did was in a good cause, then I, as an Argentine, accept it." Fangio was released after 29 hours and he remained a good friend of his captors afterwards.  The captors motives were to force the cancellation of the race in an attempt to embarrass the Batista regime. After Fangio was handed over to the Argentine embassy soon after the race, many Cubans were convinced that Batista was losing his power because he failed to track the captors down. The Cuban Revolution concluded in January 1959, cancelling the 1959 Cuban Grand Prix. The Fangio kidnapping was dramatized in a 1999 Argentine film directed by Alberto Lecchi, Operacion Fangio.

Answer this question "Who kidnapped him?" by extracting the answer from the text above.
two unmasked gunmen of Fidel Castro's 26th of July Movement