Maybe they should, but history is not so certain about that. Remember for example Che Guevara, who didn't stay in Argentina to try to start his revolution there. Remember all the International Brigades that participated in Spanish War slef-labeled as revolutionaries (as I think that being a revolutionary is a state of mind).

Revolutionaries are peculiar... they are a little like bohemians at the beginning of XX Century, all going to paris because that was the palce they should be...

"If you don't want a man unhappy politically, don't give him two sides to a question to worry him; give him one. Better yet, give him none." (Fahrenheit 451)