I have heard both sides but to be honest, most Americans will fall in the camp of believing it happened, same with the comfort women issue. When it comes “Japanese at war” there’s a reputation of being ruthless. I’ve heard many say, “the Japanese education system just brainwashes them” in response to their defense on issues.
Social justice is always a hot button so when most hear of a wrong occurring, they are quick to target the first suspect rather than sit and reason first. And with social media information/misinformation spreads fast
Personally, I trust Japanese more. Even based on current politics I feel USA/Japan are true allies. At the very least, President Trump has nothing negative to say, and he is quite picky about everything 😅