Unless he’s undead (/s), the context for any use of the symbol would be modern. And the only credible references I see to the modern use of that specific symbol are in relation to white supremacy and Aryan pride, which in the case of this dirtbag is probably appropriate.
Again, no Wiccans or Neodruids I have ever known or seen use that symbol. I feel your characterization that this guy is one of “us” is off base.