It's a matter of stability more so than "strength", no? Having never attempted to push over a brick wall, I'd guess that it'd be easier to do so for a straight

It's a matter of stability more so than "strength", no? Having never attempted to push over a brick wall, I'd guess that it'd be easier to do so for a straight double wythe than a wavy single... but yeah, baseless intuition here! The base of a double wythe wall is still only like 7", which if you're stacking say 84" of brick on top of that... seems pretty unstable to me.