I get why some females would get uncomfortable, but at the same time I think its pretty close minded as well. I am a lesbian who loves Yuri, I also have read Shoujo and Yaoi, I have a lot of both female friends and male friends who love Yuri and not to fantasize over it in a gross way that involves threesome. Plenty of guys can understand the beauty of feminine love. There is nothing wrong with that.
I find it very unfair to put all the males of the community in a bag and make them feel bad for just being males liking a genre of manga.