Jacee:
Yes, but your argument could apply to anyone who goes to another country to break laws.
If a Canadian goes down to the US to help "pro-lifers" vandalize abortion clinics, gets arrested and charged, and people say the government shouldn't help him because his actions were illegal, are you going to reply: "Well, the French Revolution was illegal as well"?
And, even in cases where I support the illegal activities, the people undertaking them have to realize that they're on their own insofar as dealing with the consequences. If someone left England to help the French Revolution, that may be a justified cause, but it does not follow that the British government had an obligation to help him out if he gets arrested. Bascially, by leaving Britain and breaking laws in a foreign country, he put himself outside the protection of British law.
If you're gonna go overseas to support revolution, you had better hope that your side wins. Otherwise, you are rightly at the mercy of the government you were trying to overthrow.