11th commandment?
That ship sailed a long time ago.
That only works when those who disagree on tactics and strategy, are otherwise in accord on fundamental party principles.
That's no longer the case in the Republican party, which is now split between the old guard who've become co-conspirators with the Dems, versus the traditionalist, conservative, patriotic, Tea Party right.
We have two distinct teams under the same umbrella at present. It's vital to differentiate between them, hence the calling out of RINOs like Santorum.