chipbennett is committing what is commonly known in logic as the No True Scotsman fallacy:

Er, no. My argument is no such thing; rather, my argument is that me calling myself a leftwinger doesn’t make the statement true simply because I said it. Likewise, a white supremacist group self-identifying as rightwing doesn’t make the statement true simply because I said it.

Regardless of whether or not such groups self-identify as “rightwing”, their stated beliefs refute such identification. They are socialists, ergo, leftwing.