Here are some shocking facts about the Potters deaths:
Multiple people were responsible for it: Voldemort for obviously doing the job, Peter for betraying the Potters by giving away their location to Voldemort, and Snape for telling Voldemort the prophecy which caused him to go after and kill the Potters.
It all could have been easily avoided: if Snape had never told Voldemort about the prophecy in the first place, if the Potters had accept Dumbledore's request to be their secret keeper, if Sirius (who was the initial secret keeper) hadn't convinced the Potters to switch their secret keeper to Peter, if the Potters had not agreed with Sirius's idea to make Peter their secret keeper,or if Peter hadn't given up the Potters location.
Most shockingly of all, still bitter over his past treatment of Snape, the fans took it out on one man (James Potter).
Tell me what you think of all this!