Activists protesting in support of the Safe Schools anti-bullying program have trashed the office of South Australian senator Cory Bernardi.
Slogans such as "transphobia kills" and "stop homophobia" were scrawled in chalk outside Bernardi's Kent Town office early on Friday afternoon.
The group, apparently representing the Socialist Alternative, upturned furniture and threw documents around the office, leaving behind a sign saying "Muslims are welcome. Racists are not."
Bernardi has been a vocal opponent of the Safe Schools program, which the government today announced will be significantly wound back following complaints from conservative government members, led by Senator Bernardi and Queensland MP George Christensen.
Senator Bernardi quickly took to Twitter following the incident, decrying the protesters as "lefty totalitarians".
Education minister Simon Birmingham called the incident "deplorable."
"For people who say they are standing up for tolerance and for understanding to then think that destruction of public property, that violence of that manner is appropriate is deplorable, is hypocritical and I would have hoped we would see much better," he said.
Labor's education spokesperson also slammed the protests.
"It is wrong. It is dumb, and it undermines any point they were trying to make," she said.
South Australia Police has been contacted for comment.