If only a third of the population is a " threat" as you see it, what is the problem ?
People discriminate all the time, my wife discriminated against other guys when she married me .
So if a " Christian " business did not want to do business with, or hire a person because of a closely held religious belief, there are another 60% of businesses, using  the authors stats, that would love to have that business, or employee.
Only control freaks want to force every one to conform.
Being " free" means we have the right to be wrong, at least as far as others may see it.