There are many, many, propaganda pieces that prove otherwise, starting with the co-opting of the Iron Cross, not to mention all the early Nazi propaganda pamphlets, regardless of what the weirdo fringe of the Thule society wanted once they were in power.

That said, it's not like the meme is saying it wouldn't be the same shit in an alternate timeline where Martel lost at Tours, or whatever, just a reminder that most "Christians" view it solely as a tribal identity and not a moral philosophy.