I dont spray with organic pesticide. Maybe I'll start. Maybe a kale isolation unit could resolve the problem. I used to just 'remove' offending pests.
I can overlook the holes in the outer leaves of the cabbages, who needs the outer leaves? And why dont they eat the chard? We have plenty of that. But oh the kale, NOT THE KALE! My coveted Tuscan kale... That pushed all my Tarantino buttons.