Minor's Pregnancy will win. The Mexicans don't want their babies killed.
The real cause of the losses amounted to your second point: "Of course, stupid are also all those who stayed home and did not vote..."
These folks just didn't feel fired up about anything positive and were turned off by the negative ads. So, the union goons were able to mobilize their forces to defeat those of us who did vote for the reforms.
As of this hour's results, San Fran voted most strongly against Prop 73 with 80% NO.