Star Trek Quote

From the episode " The drumhead" this conversation reminds me of many real world-conflict situations:

Jean-Luc Picard: We think we've come so far. Torture of heretics, burning of witches, is all ancient history. Then, before you can blink an eye, suddenly, it threatens to start all over again.

Worf: I believed her. I... I helped her. I did not see what she was.

Jean-Luc Picard: Mr. Worf, villains who twirl their moustaches are easy to spot. Those who clothe themselves in good deeds are well-camouflaged.

Worf: I think... after yesterday people will not be so ready to trust her.

Jean-Luc Picard: Maybe. But she, or someone like her, will always be with us. Waiting for the right climate in which to flourish, spreading fear in the name of righteousness. […] Vigilance, Mr. Worf. That is the price we have to continually pay.