From the fear of voting against the PAP, to the fear that the PAP may be taking the people's support for granted, to the fear that the PAP may dominate and be permanently entrenched in the local political scene.
As Yoda said, "Fear leads to anger. Anger leads to hate. Hate leads to suffering."
And so the Singapore voter has found the voice for their fear. And their screams of fear has become yells of anger. And the anger has been directed at the PAP.
The PAP has tried to blunt the anger, but the apology may simply be too late.
So anger leads to hate, and a vote against the PAP.
All that is left is to see if suffering follows.