I originally thought was that if Buk took the time before he died to make sure what his epitaph would say maybe he and Linda Lee discussed having buddhist monks there also. I guess only she herself would know but I think it's safe to say that it was probably her idea. I don't want to dwell on this thing too much because, honestly. do we really fuckin' care? No.
As far as Buddhism goes, with my limited knowledge of it, it's just as fucked as all the other religions. I know, I know, there some wisdom in it - but that probably goes for all of them. Let's not get into a religious debate. As Bob Dylan once said " all the truths in the world add up to one big lie".