1) "Jesuses" is not an acceptable plural or possessive form of the Lord's name, much as Jeez-its is not an acceptable way to refer to communion wafers.

2) Halloween is actually a Christian Holiday, All Saints/ All Hallow dates way, way back as official holiday of the church 13-1400 year ago, that it's got a lot of connections to various harvest festival and local pagan traditions is kind of irrelevant except insofar as it influenced local practices. The Eve or 'een for Halloween is a touch more recent, though has reliable dating to the Middle Ages.

Trick or treating as a major regular US event is basically post WWII and has since become a 6 billion dollar industry. Essentially it is best summed up to various uncivilized foreign devils as a chance for children under a monstrous costume's veil of threatening anonymity to engage in extortion to support their sugar addictions on threat of vandalism, as well as an opportunity for young women to dress as scantily as possible and get drunk without fear of social disapproval.