It was not the presence of any of these groups that led to war, it was other factors entirely.
The Aryan connection (if that is what you meant, and I still hope it wasn't) is to the assumption of white supremacy (particularly the supremacy of the blond blue-eyed pure-blooded germanic type).
THAT is what led the "master race" to hound, revile, arrest, sterilize, imprison, and eventually apply the "final solution" of the gas chambers to anyone who didn't fit that stereotype - the disabled, the mentally ill, the religiously unusual, the slow to learn, Gypsies, Jews, anyone different.
Today we would call it racism or genocide. The attitude of hatred whipped up towards them caused unbelievable acts to be carried out.
If anyone whips up hatred toward any group of society, then the blamed for any bloodshed that ensues is down to THEM not the group they have demonised.