If by 2.4% of the world Drich means percentage of the world's population that is atheist; he seems to be making a point that being a minority somehow makes us wrong. That isn't true, which is good for him, because the percentage of the world's population that is Christian is 29.81%; also a minority. But it's argument ad populum anyway, which means it really doesn't have anything to do with whether we're right or not.
I'm not anti-Christian. I'm anti-stupid.