He is butthurt because he became God's hammer against his will when he killed that other black metal dude. The other guy was tempting God by saying (paraphrasing here) "I dare God to stop me doing this shit or that shit (I think it was burning churches or something worse don't remember), spoiler, He can't lmao". A week later, he got killed by Varg. Varg, ethnically Jewish (just like his wife btw), is of course immensely butthurt about this up to today.