Oh yes. We don't what goes on in their heads at times. I do believe it is a hierachical thing.
A dominant pair can attack anything which they think is trying to invade their space. In a loft, of course, that means every other bird. Especially a squeaker that gets down on the floor.
This is another reason why I want every pigeon flying out, every day.
There's nothing like an hour tearing around with the young birds, followed by a bath in the sun, to take the acid out of an old cock bird. They are generally happy to have their dinner and not be attacking a small youngster that is on the floor.

Greetings from the land down under.

Blessed is he who expecteth nothing, for verily, he shall not be disappointed.