I can only humbly offer my poor service as a clinical psychologist working many years in the pscyhiatric field.
And as much as I like and endorse Berthold's nice contributions regarding orchids (e.g. the photos of the delicate and rare dendrobium vietnamense and the exquisite and spectacular well grown Clowesia dodsoniana), in the field of discussing other topics (like climate change and now obviously also physics) my clear advice would be: don't feed his belligerent side by commenting in any way on his statements on these matters, no matter how obnoxious or emotionally upsetting you may find them!
Like anybody else he is entitled to his views, but one has the sense, that he, in these more 'political' matters, is deliberately wording them in a way to provoke - and in the case of the demise of mr. Hawkins on purpose sadly seems to choose to not show consideration for the emotions of people, who feel a genuine sense of bereavement by mr. Hawkins death. Some might see Berthold's behaviour in this case as an inappropriate lack of decorum, others as down right bad taste.
No matter what, like the proverbial and pathological stalker, Berthold seems to thrive on any kind of response or feedback - indeed, negative response only spurs him on to further upsetting remarks. If you disagree with him, please, simply ignore him! In this way you rob him of the satisfaction, that the expression of your emotional distress would give him!
Kind regards,
Jens