If you are in a mind to take a tour to Iran and you have such a worries about the people of Iran, be relax, cuz Persian are amongts the MOST friendliest peoples in the world?
The ancient history of Iran also depict that Iran is a friendly country and the people of Iran are good hosts. They have their own moral values which transfer to their blood from years to years and they know how to deal with the guests.
Iranian people are genuinely friendly and interested to know about you and your country, so leave aside your pre-conceptions and come with an open mind. Iran is still a relatively low-crime country.
In case of Safety travel to Iran and in general, Iran is much safer than what Westerners might expect.