>>55201425>kill xeno's on sight, no matter the orders
This isn't consistent with the fluff. By nature, Ordo Xenos has to have dealings with xenos on occassion, and the Deathwatch provides protection. If they were a bunch of retarded kill-bots who'd ignore orders and ventilate some Tau representative, triggering a massive border war the Imperium can't afford to fight, they'd be useless as a chamber militant for anything but direct assaults.
There's no mention, that I'm aware of, of Deathwatch receiving additional hypno-indoctrination over what regular astartes do either, regular astartes already hate xenos like it's their job.