I'm not 100% sure about this so keep that in mind when reading this. Most likely you've listen to Gwar's song Krosstika and that's why your wondering (if you heard about it from any where else please let me know.) Listen to the part where it says "The Swastika! And the Bloody Old Cross! Two great hates! That hate great together!" Now put the Swastika behind a cross and use it as a symbol. Kros from Cross Stika from Swastika. I'm not 100% sure about where the bloody old cross comes in but my guess is the Krosstika symbol means the same thing as both Swastika and the Bloody Old Cross.