No different than King Ezekiel's vocabulary & accent -- blame it on PTSD, blame it on "people are gonna do crazy stuff in the zombie world".......blame it on "they use an odd dialect to keep others off-guard, almost like a defense mechanism."

Now, the complaint of 83k Internet posters -- why was Rick's awesome plan to walk in there, solo, and win them over (armed only with his charisma)........dunno.

And then, why even waste time with that whole adventure -- only for the Heapsters to run away, 20 seconds into the mid-season finale.

Maybe there will be a great pay-off in 4 months -- but so far, everything with the Heapsters has been a waste.