Monkeys tend to throw things, like feces, at each other. They also spit at each other. Technically, a virus that is transmitted by projectile spit or thrown feces is not “aerosol.”
Other studies have placed naive monkeys in the same room with Ebola monkeys, and they did not get sick.
Maybe so, but we don't need to act as if it might not be airborne. The experts who study this stuff do not take the chance.