If their hateful conduct and ideas are hidden from you, how will you know to fight back? "I disapprove of what you say, but I will defend to the death your rig

If their hateful conduct and ideas are hidden from you, how will you know to fight back? "I disapprove of what you say, but I will defend to the death your right to say it." We should not be afraid that our ideas will lose if all sides are heard. We must win this war of ideas, there is no other way. But we cannot win unless we can point to what is wrong with their ideas. For us to achieve that, they must not be hidden. It seems that history did not end. Every generation has to win their incarnation of this war, again and again, unfortunately. The beginning of our struggle is drawing nearer and nearer.