@Britexpat you are talking about "Humanists" as if they are a majority, you got U.S.A which is mostly Religious, Christian and whatsoever, you are speaking of Humanists as if they are millions and millions.
Do not forget that the religious lobby in America and such countries is the one that holds the most power, so people can't just go around and invite people to think rationally without religion.
Or else the Churches will run out of people to give them money.
And the idea that you are implying "Because of the murder of these victims , many faiths came and united" is completely disgusting, why haven't they done so before anyone getting killed?