historians sometimes remind us that we ve seen ugly times before as a nation, and it s true. the alien sedition acts, the first red scare, mccarthyism all saw deeply divisive politics and incendiary tactics. we look back on the period with shame, as we surely will this one. and let s get started. we will not give the killer the dignity of offering hiss name today. but i will name the terrific panel i ve gathered to talk about this. the ceo of the anti-defamation league. tom freeman the new york times op-ed columnist and david frum, a senior fellow from the atlantic. what is the big take away from