That's not true at all. The other subspecies had boats and gunpowder, yet they didn't use them to commit genocide against each other. For example, orientals and aboriginals knew of each other's existence and even traded with each other, yet didn't commit genocide against each other. Yet another race far removed from either of them committed genocide against them both. Coincidence? I think not.
Picrel, it's not a coincidence that whites are the only subspecies to vote right wing. Hatred towards the other subspecies is in their blood. Now you might say "well, what about the latinos? Most of them are white!" Well that's just the thing, the republican party has a genetic makeup that is whiter on average than the average latino, which makes their views more right wing, which alienates the average latino. But still in every latin american country whites (including mostly white mestizos) vote overwheminly right wing, while the non-whites (blacks, indigenous, arabs, etc) vote mostly left-wing.