I'm sure the nerds here will find ample opportunities to tear this movie apart, but keep in mind that the "average American" (a) doesn't know much about Snowden, other than "he stole secrets and hid in commie Russia, so he must've been working for them", and (b) just believes what the government says. To counter the powerful voice of the government, you need an equally powerful voice like Hollywood. Maybe this movie will make the average American think more about the issue, and it might even cause some to change their views about Snowden. If it does, this movie has served its purpose, and kudos to Stone.