The employers in these cases are interfering in the relationship between the insurance companies and his employees because of the employers' personal views. It's none of his damn business.
Last time I checked, it was the employer who determined what the insurance coverages for employer sponsored health insurance would be... not the employee.
I've never heard of a single case of an employer who had the right to dictate to an insurance company what they could or could not offer as far as coverage. That's not surprising since he doesn't own or run the insurance company and has no standing to interfere with their business.