[Who dat?]

How can you convict someone without presenting evidence or witnesses against the alleged culprit?

See, he has the wrong idea already. Someone needs to explain the difference to him between convicting a person and killing a terrorist (or someone who educates, funds or encourages them).

[SirAllen]

How can you convict someone without presenting evidence or witnesses against the alleged culprit?

The call us hypocrites? How can they murder 7000 people without any evidence or witnesses?

Maybe they would understand it better if we said this was a "crusade" so we can kill or convict anyone we want.