My namesake persona would only have one thing to say about this. Karma 
I find non native English speaking people try to be concise as possible with the English language. So much so that they end up using the English language better (proper) than native English speaking people. It would be the same for others in a different setting. It amounts to the native speaker being more relaxed and knowing the inferred or implied ambiguities. Seeing native speaker using double negatives,interchanging adverbs and adjectives with verbs can (intentionally or not) confound anyone regardless of the tongue it is versed in. I am sure wars have been started this way or at least a few bar brawls.
It has its own kind of confusional humor but I can relate to its discord.