Kansas...home of the Westboro Baptist Church.
I ask again, HOW did they know he was gay?
I'm not sure why you need to ask this question three times. You've never seen an obviously gay person before? You've never seen a man with effeminate behavior and knew that dude was gay? Seriously??
You're being purposely obtuse.
Not everyone has gaydar. Some people are so invested in equality and diversity they automatically reject stereotypes.