Clive....Sadly, I have to say I've been betrayed several times, some, more painfully than others. IMHO, very few if any individuals can slide through life without ever having experienced betrayal to some degree . Once again, we're dealing with human nature.
The vast majority of times that someone will betray, the motive is ultimately discovered to have been severe selfishness (putting one's self before anyone & everyone).
In an effort to cover for a mistake, flaw or intentional action, one will "betray" another. In slang terminology, we have heard this described as "throwing someone under the bus." It's all part of the blame-game to make someone other than yourself responsible for a situation. It's also considered the age old "Stab in the back."
Unfortunately, "trust" and respect are not valued by all equally. It would be difficult to ever betray anyone if we all valued trust & respect of all.
As anyone who has dealt with a betrayal situation can attest, this is a painful, often devastating blow. It is very difficult to understand, remains an open wound for lengthy periods of time and nearly impossible to forgive until fully healed.
It's tough to admit to experiencing betrayal more than a couple of times. For me it was a hugely rude awakening, not only about the betrayer, but myself as well & my tendency to believe, trust & perhaps be a bit naive.
I can safely say that it has been a long time since this has happened. I'm sure this is due to the lessons I learned well and being more protective of my self. I strive to not leave myself at risk of betrayal. It requires experience and wisdom to do this. Paula