lol, it's an English saying
although calling something 'gay' or 'jewish' would appear racist or sexist or simply derogatory, i assure you it's not....
It's simply a phrase used to describe something that displeases you...
Much like saying 'THIS BLOODY PRINTER DOESN'T WORK!"
That doesn't literally mean the printer is in any way blooded up, it simply means that you are displeased with the printer.
Or when someones kid does something wrong and the parent says 'I'm gonna KILL you!'...the parents wont actually murder their children, it's once again, a figure of speech