Worshipping Satan on Halloween

Most Brits don’t believe anymore that they must refrain from worshipping idols or other gods. The Vatican is in uproar over the liberalism of Pope Francis. What do these developments have to do with Halloween? What is the origin of Halloween? Is there a connection between Halloween and All Hallows Eve? Pope Gregory III tried to transform Halloween, and evil Samhain practices were adapted by the church into a tradition called “souling.” But can you make something “Christian” which is thoroughly Satanic?