However, a handful of others attended to show their support for the UK military.
Nick Franklin, from Patriots! Stand Up Gloucestershire, said: “Nobody wants war but we also don’t want to be walked all over.”
He said he would tell the other protesters to “grow up”, adding: “Get involved and get behind our military.”
The group believe the US-Israel war with Iran will benefit the Iranian people.
Gloucestershire Constabulary attended the protest to “enable lawful peaceful protest”.