I'm pretty sure Snake Eyes is 100% red-blooded american, who was adopted into a Japanese clan. I don't think he has ever been stated to be of japanese ancestry, partial or otherwise. Which makes Snake Eyes a guy who opened himself up to a foreign culture and walked away from it better than he was before. Murika.
I stuffed myself full of green beans and pork chops. Meanwhile, the mosquitoes stuffed themselves full on my legs. Food for everybody!