Many anarchists were simply murdered:
- nazy-germany the anarchist movement was whole-sale murdered. Since then there is no anarchsist movment in germany.
- franco-fascist-spain he murdered 200,000 anarchists after the civil war
- ukraine machnowiki anarchists
- russian anarchists and many more...
that is the reason why there is no anarchist movement in europe today. Before these events Anarchists were a major part of the workers movement.
It's been propagated by the detractors of anarchism. The same defamation was used towards the republic when monarchies where the rule rather than exception. People often equated the concept of a republic with chaos and disorder, just like they now do with anarchism.