The bit about stopping live performances because of 'Bigger than Jesus' is new to me. I'd thought it was about the fact that they couldn't even here themselves playing anymore because of fan screaming and the general nuttiness of Beatlemania. This new reason sounds just as plausible.
Found this quote on the Revolver wikipedia entry:
Revolver very rapidly became the album where the Beatles would say, "OK, that sounds great, now let's play [the recording] backwards or speeded up or slowed down." They tried everything backwards, just to see what things sounded like.
– EMI recording engineer Geoff Emerick