Kaczyński, as a master strategist, may actually have masterminded Duda's veto
A very quick skim of the piece seems like it's reaching. Occam's razor suggests tha JK simply underestimated how strongly the public felt about this (like his jihad against Donald Tusk earlier this year), it's not like he's ever had his finger on the public's pulse.... he has nothing remotely in common with most people in the country.
Also the idea that PiS doesn't lose anything from public protests is kind of ludicrous....
I do think that protest burnout is a real possibility so I think big public manifestations after today won't be needed for the time being.