Simply put - politicians are getting exactly what they deserve.  They can't lie and manipulate the voters for decades and not expect a reaction.  And, of course, they propose not a small increase but six times the current rate (1% to as much as 6%).  The Herald's representation of the new cap is murky at best as it seems to imply that the cap would be 5%.  According to this "brief summary" of the bill the amount can go to 6%:

 Changes the annual regular property tax revenue growth limit to the greater of 100
percent plus population change and inflation, but not to exceed 105 percent, and 101
percent.