They are not entirely closed off. Apparently there is a communication going on around closures, because I have seen fairly inside Iran info in French media (about executions, about people leaving Teheran etc etc). They are more guarded and dont do strong statements as OP. It is not possible to establish general what people in general think under current conditions. The executions are still going on, no one will randomly admit they are against irgc. But, they are fairly consistent with what he said.
The other consistent thing I heard in interviews (this time by British media) is that Iran is very nationalistic. Even people who hate regime are proud of Iran itself. That makes them more prone toward rally around the flag.
And unfortunately, America made it clear it wants to harm average Iranian. Plus its idea of regime change is to keep regime intact and change head (see Venezuela), so there is no one who would had actual reason to want America win.