(The blob was not made by William Afton, It was made by ennard growing into molten freddy, because more animatronics wanted revenge on William, and then basically every animatronic joined in, thus creation of the blob.)
Because.... HE KILLS CHILDREN. HE STUFFED THEM INTO ANIMATRONIC SUITS, AND ALL OF US CHILDREN THAT NEVER GOT TO LIVE OUR LIVES MAKE IT OUR LIFE'S MISSION TO RUIN HIS.
Oh Cassidy… anyways my dad adopted new children and now I made him angry because of a pizza with bug and and! He doesn’t accepts me as his child anymore sniffs*