Here's what rhymes with vigilantism.

Consider these alternatives

criminality / personality exhibitionism / given condone / known infanticide / side sectarianism / given incites / rights fanaticism / position anthropocentrism / ethnocentrism exclusivism / given immorality / personality incivility / stability communalism / given patricide / side victimization / information barbarism / given sentimentalism / given disobedience / obedience divisiveness / decisiveness perversion / person tokenism / given idealization / relation irresponsibility / ability promiscuity / continuity perpetrate / late