Do not forget that Spraw has been told both by USA Volleyball and the US government prior to this trip, "Do Not Say Anything Negative About Your Time in Iran, while in the country."
It is a common thing to remind people when traveling abroad, the cultural norms are different than those of our own. Just observe and take mental notes. (I traveled in China and felt very uncomfortable when not with friends to talk about things that looked strange)
Additionally, some countries promote open and free discussions (does not mean people agree). Additionally freedom of the press and broadcasting enables people to criticize their governments and officials to be a watchdog for when things are done wrong.
If Spraw or any American player said something negative about the trip, the Iranian government could have throw them in jail. It is much easier to complain, when you know you will not go to jail.
I am glad that I live in a free country, where I can state my opinion without government retribution.
If Spiridonov was talking then it may be a different story.
During the cold war between the USA and USSR, often the political challenges did not turn out well. The political rivalry was then promoted into sports, USA vs. USSR in basketball, ice hockey, track, etc. Do not forget about India and Pakistan in cricket.
The 1998 World Cup match between USA and Iran was built as a political battle, but it was just a sports battle. The volleyball matches again, just a sports battle.
On this site and in my studies (lived in Japan for 1 year, graduate school with Chinese, Thai, Taiwanese students) and travels (UK, India, China, Singapore, Brazil), I have learned that there are many cultural differences, but you need to observe what commonalities we as humans have and try to work with those to make connections to people with different backgrounds than my own.
The reason we come to this site is that we love the sport of volleyball. We may complain about our team (which ever team you follow) or players. Some of this is based on truth (the results of matches or statistics) and some of this is on personal bias (Growing up in the states, I am a USA fan and after living in Japan, I am a Japanese fan). This site is open for discussion, which is a good thing for all of us.