@Parlance The first two links you have are leading to the start of the same thread (why is everyone suddenly bad-mouthing Paul).
As for the conversations turning negative it would help if folk didn't take folk saying Paul was not as good as John or vice-versa so personally and treating it as an attack on themself, that (n)either or the two Beatles can not withstand such a comment or two, and so therefore they must fight back on their behalf with all guns blazing.
I probably prefer Johns Beatles work over Pauls but i hate to say so as Paul's is so damn ...