Unless the US colluded in putting the Tyrants in place, of course. Then it's different.
The people of Mexico, Guatemala, the Dominican Republic, Chile, Panama, Nicaragua and El Salvador undoubtedly agree with you (and thats' just one hemisphere!) Sadly, I can't remember the last time the US supported those fighting for Freedom and Democracy. Was it when Reagan armed the Afghani 'mujahedeen' (later the Taliban) and called them "the equivalent of our Founding Fathers?" Or was it Bush's 'nation-building' project in Iraq (a policy he campaigned against in 2000) which necessitated destroying that nation's infrastructure, abolishing its security forces and tipping it into Iran's orbit? Or is it Obama's flaccid attempts to steer a centrist course in the Middle Eastern and North African 'Arab Springs,' encouraging extremists as a result?