Those few great masters like HHDL, Karmapas, Sakya Trizin, Dudjom, Dilgo Khyentse, Trulshik, Kunzang Dorje Rinpoche etc. had/have great clarity for example recognizing tulkus, sensing or even seeing things on rare occasions about certain people and so on. Nevermind other apsects of their great clarity on power locations, prophecy, teachings, activity, etc. They have met some self appointed so called western masters and (fake) tertons etc. like Roach and several others but did not immediately condemn and dismiss them because there are different ways to subdue different malevolent reincarnated beings. Roach tried to pervert the Gelug order's vows and even pulled a stunt in Dharamsala despite being told not to by his master HHDL's office and in his US compound contniues to teach against the institutions of Tibetan Buddhism under the various school leaders. It is sad to see so much corruption and abuse over the decades by these western so called masters and their cults whitewashed by some westerners as insignificant.
It is sad to see this reborn inauspiscious spirit has set up yet another corrupt western mandala in the name of Tibetan Buddhism and some who still defend him in various ways and degrees. And causing to create bad press for Tibetan Buddhism online and in print on a large scale. Worst of all, sad to see someone die unneccessarily. But the way Roach, fake tertons and other fake masters have been dealt with over the long time by enlightened masters is the way to effectively subdue these beings for future with as little damage as possible. Also there are many dimensions a being occupies which he/she is unaware of and only realized masters see some of those and only a fully enlightened Buddha like the Victor Shakyamuni sees all of a being's many dimensions.
Dzogchen masters I know say: 1)Buddhist religion essence is Dzogchen 2)Religions are positive by intent/fruit 3)Any method's OK unless: breaking Dzogchen vows, mixed as syncretic (Milanese Soup) 4)Don't join mandalas of opponents of Dalai Lama/Padmasambhava: False Deity inventors by encouraging victims 5)Don't debate Ati with others 6)Don't discuss Ati practices online 7) A master told his old disciple: no one's to discuss his teaching with some others on a former forum nor mention him. Publicity's OK, questions are asked from masters/set teachers in person/email/non-public forums~Best wishes