Virote_Considon
The Great Dictator
If you're looking for evidence of Iranian belligerence, you would find it in the decades since the Ayatollah Khomeini came to power. He had thousands of political prisoners executed, enacted fatwas calling for death to critics overseas, supported the hostage taking in 1980, and engaged in countless civil rights violations in his own country, especially including restrictions on women's rights. Suppression of the Baha'is - their leaders killed or fled the country. Harsh punisments for common crimes. The closing of many newspapers. He and his successors have kept up an ongoing support for terrorists throughout the Middle East including shiploads of weapons smuggled into Gaza disguised as medical supplies. Arrests of tourists and journalist as spies. Rigged elections. Violent suppression and killing of peaceful protesters. Etc., etc..
Most of these aren't examples of Iranian belligerence because they negatively effect Iran and not outside-of-Iran.
There are plenty of examples of Iranian belligerence, but you haven't listed many of them.