How do you know that in the pictures are all Sinkies?
Do you know there are thousands and thousands of PRC Chinese getting Singapore PR or Singapore Citizenship? Even though the PRC Chinese became Singapore PR or Singapore Citizens, their barbaric or uncivilised behavior still remains in them.
10 years or 15 years ago, do you see Singaporeans Chinese behaved so uncivilised in the public? Very very rare. Even in those times if the Singaporeans Chinese behaves badly, but never to a stage that they allowed their children's to shit in the food court or public places.