Please don’t accuse me of making claims I did not. I gave one example of Viking homophobia. It’s also a big example, as “not appearing as an ergi” is pretty much the driving motivation for many of the gods in the tales we have. This means being manly in general, and being penetrated by another is just one thing that immediately labels you as ergi.
Neil Price did not make his claim that Vikings were severely homophobic from a single word either (no idea where you got this). You are free to read his work yourself for more information.
Thor literally doesn’t want to dress as a woman in this story EXPRESSLY because he fears being labeled ergi. He says this explicitly.
This is story is a comedy, and this portion of it is told as a joke at Thor’s expense, where Loki and Freya tease him about it.