A bit is an understatement regarding Luke Jr., sadly yes we do have people will mental issues as part of Bitcoin Core development team. Which is sad, even more sad Luke Jr. isn't the only one.
By no means. For example, I have some "mental issues", that is, I entertain some notions
that great deal of people may deem crazy. And since quite a lot of Bitcoiners are
of somewhat individualistic bent, I take it as given that I encounter a
lot of notions here that seem to myself crazy or reprehensible.
Thankfully none of that matters in the least with regard to the issues we are
discussing here.