LOL! You didn’t put your ghouls, goblins and ghost thread in here.
All Saints' Day did not begin as any sort of pagan anything.
Samhain was Samhain back when All Saints, in the West, was where it still is today in the East, the Sunday after Pentecost.
Moving the Western observance of All Saints' to November 1 was a decision made in Rome, and had nothing at all to do with the pagan Celts or their holidays. (The primary motivation seems to have been to put the celebration after the harvest when the pilgrims could be easily fed. Food supplies are obviously going to be a bit sparser in the spring, and Rome already had to feed many pilgrims during Lent and Easter.)
Paganism first codified by the first Pontiff Emperor Constantine. Not unlike Easter and Christmas
Just more Paganism !
shalom b'shem Yah'shua