Conducting a witch hunt is hardly the pass-time of good men. Do something useful, or do nothing. The context is somewhat lost with the original comment gone,

Conducting a witch hunt is hardly the pass-time of good men. Do something useful, or do nothing. The context is somewhat lost with the original comment gone, so I will rephrase my sentiment more generally : save your passion and focus for doing great things, not fixating on the mistakes of others.