Hate sexism, too?

I can't see this as a sexist act, just ignorance

This is pretty much the main constituent in the recipe for what all sexism / racialism / homophobia. Add a pinch of poor logic and you are there.

Sexist would be to deny her the chance to do the job she loves, which hasn't happened.

Sexist would be judging someone's ability and even right to do a job base on their sex chromosomes.

there isn't a single football fan that hasn't commented on the female lino. most have been jokes about her being a women, these conversations weren't taped and broadcast, and these men aren't sexist.

These football fans do not have the influence, they are not necessarily in a job working in and promoting that industry. If they are people are allowed to have the sexist view but it much not effect your behaviour at work. These two were at work, while at work a level of professionalism needs to be maintained, on air or off air they were still at work at a job that represents and promotes football.