3) You are not encouraging any Jews to drive on Shabbos
SJS: You ARE encouraging Jews to drive by making it easier to park (i.e. having a convenient parking lot available on Shabbos in Yerushalayim, which is obviously the mechallel shabbos Mayor’s goal in opening this lot.)
For that reason alone (we’ll leave the others aside for the moment) this is a non-negotiable issue and Klal Yisroel will fight this machla tooth and nail without cease, until the situation is rectified appropriately.