The BBC article seems to suggest he did have mental health problems

Interesting. On the BBC article it states he did have mental health problems but the chap who I presume has not got a phd in psychology has managed to read the mind of a dead man to know his motives. It feels in my opinion saying it was right wing is more convenient than to say it was done because he had clear mental health problems. This conclusion it was right wing motivated as an official line, is uncomfortable for me.