I often struggle to become convinced of what to believe with these sorts of things. Is the media to be believed? Is this state or that nation bad?
But, I know that during the Arab spring the Iranian revolutionary guard killed their own people. That removed all of my doubt, the Iranian government is bad. Anyone that would kill their own people are capable of much worse. They had no due process, no investigation, just killing in the streets. It didn't take the opinion of a news anchor for me to reach that conclusion, I saw it with my eyes.