They don't just affect employers, they also affect lots of service providers. As a result, people who would be likely to be subject to discrimination under those laws (whether currently living in the area or not) may view living and working in the affected areas as less attractive, making hiring more difficult for employers in the affected areas.
This may, of course, be somewhat offset by attracting people supportive of the discrimination thus enabled, making it easier to hire those people.
This may, of course, be somewhat offset by attracting people supportive of the discrimination thus enabled, making it easier to hire those people.