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The total value of the items in the suitcase was estimated to be at least S$2,000.
The tour leader allegedly assured them the bus was "the safest place" and suggested leaving items onboard.
Many netizens criticised the father for being irresponsible.
The eight snakes were found to be ball pythons, which are classified as endangered species.
Angry motorcyclists yelled "bodoh (stupid)!" at the driver as they passed.
Lorries displaying "Legendary Figure" banners were also parked along the funeral procession route.
"We shouldn't care what race we help," said the heroic delivery man.
The victim was rushed to the hospital, where he managed to survive his wounds.
"We don't want to use tactics that shouldn't be carried out in Singapore," he said.