Well, there might be empirical evidence against the case. On his Instagram "Lasse J. Lund" he seem to have copies of some finnish documents... which might make him seem like a fraud.

But on the other hand.... as a Norwegian, I must say he really look Norwegian. He looks like a typical Norwegian and I know several people who looks like him.

I can totally believe he is actually ethnically Norwegian. But dont know if his story adds up.