Yes, trying to make changes in the political setup of other countries is naive and dangerous as there may be a myriad of factors, social and cultural, that may make doing such dangerous. Cultural and social differences lead to enough trouble within the United States, and mixing those with those of another nation can be quite tricky.
Well meaning people have caused a lot of damage throughout history. The most recent example of this has been the war in Iraq. It was a war of choice that was based solely misguided and false information. In rare cases of extreme human rights violations, countries and governments should mind their own business.