The rapture of the saints is also the judgment on apostasy
Deuteronomy 13:1 If there arise among you a prophet, or a dreamer of dreams, and giveth thee a sign or a wonder, 2 And the sign or the wonder come to pass, whereof he spake unto thee, saying, Let us go after other gods, which thou hast not known, and let us serve them; 3 Thou shalt not hearken unto the words of that prophet, or that dreamer of dreams: for the Lord your God proveth you, to know whether ye love the Lord your God with all your heart and with all your soul.
This is what apostasy is, it is "going after other gods". We are told clearly that we will be tested with this. You should not think it strange that the church is tested. So ask yourself, where is the church being proven to see if she will chase after other gods? Christmas is a very clear test, are you worshiping the Lord Christmas eve, or are you worshiping materialism Christmas morning? The same thing is true of Easter, are you up at dawn to worship the Lord's resurrection, or are you looking for easter eggs and bunnies? These are tests where we are being proven. However, with both those tests it is somewhat gray area, for many the joy of Christmas is the Lord's incarnation and the joy of Easter is the Lord's resurrection. Many don't know the deep things of Satan, they don't know what these holidays truly are, so for them it is pure worship of the Lord. However, with Halloween there is no excuse, no confusion, no gray area.
4 Ye shall walk after the Lord your God, and fear him, and keep his commandments, and obey his voice, and ye shall serve him, and cleave unto him. 5 And that prophet, or that dreamer of dreams, shall be put to death; because he hath spoken to turn you away from the Lord your God, which brought you out of the land of Egypt, and redeemed you out of the house of bondage, to thrust thee out of the way which the Lord thy God commanded thee to walk in. So shalt thou put the evil away from the midst of thee.
This is what happens at the time of the rapture. There will be many Christians left behind, they will have been swindled by religious leaders who caused them to turn aside from the Lord that brought us out and who redeemed us. People will be outraged at them and kill them. They will also burn those churches and in this way fulfill the Lord's word about putting evil away from the midst of thee.
6 If thy brother, the son of thy mother, or thy son, or thy daughter, or the wife of thy bosom, or thy friend, which is as thine own soul, entice thee secretly, saying, Let us go and serve other gods, which thou hast not known, thou, nor thy fathers; 7 Namely, of the gods of the people which are round about you, nigh unto thee, or far off from thee, from the one end of the earth even unto the other end of the earth;
All of these costumes they wear on Halloween are "other god, which thou hast not known". They are the gods of the people round about. The Superheroes are simply pagan gods, fallen angels. Others will dress up as demons, witches, warlocks, wizards, all kinds of occult and satanic beings. Buying these costumes and wearing them, that is to "serve" other gods, that is to "go after them".
8 Thou shalt not consent unto him, nor hearken unto him; neither shall thine eye pity him, neither shalt thou spare, neither shalt thou conceal him: 9 But thou shalt surely kill him; thine hand shall be first upon him to put him to death, and afterwards the hand of all the people.
The rapture has two sides. Yes, for some they are caught up to heaven, but for others they will be revealed as false, they will be hated, and they will be put to death because it is the judgment of God on the apostasy.
10 And thou shalt stone him with stones, that he die; because he hath sought to thrust thee away from the Lord thy God, which brought thee out of the land of Egypt, from the house of bondage. 11 And all Israel shall hear, and fear, and shall do no more any such wickedness as this is among you.
This will happen in the US but all believers around the world will hear and they will fear and they too will no longer do such wickedness.
12 If thou shalt hear say in one of thy cities, which the Lord thy God hath given thee to dwell there, saying, 13 Certain men, the children of Belial, are gone out from among you, and have withdrawn the inhabitants of their city, saying, Let us go and serve other gods, which ye have not known; 14 Then shalt thou enquire, and make search, and ask diligently; and, behold, if it be truth, and the thing certain, that such abomination is wrought among you; 15 Thou shalt surely smite the inhabitants of that city with the edge of the sword, destroying it utterly, and all that is therein, and the cattle thereof, with the edge of the sword. 16 And thou shalt gather all the spoil of it into the midst of the street thereof, and shalt burn with fire the city, and all the spoil thereof every whit, for the Lord thy God: and it shall be an heap for ever; it shall not be built again.
This sounds like Sodom and Gomorrah. Nowhere is the rebellion and pride of Sodom and Gomorrah on display more than on Halloween. In all of human history I don't know if this word was ever fulfilled, however, it will be fulfilled by the Lord at the start of the seven year tribulation. Jesus says that He will give orders to gather up the Tares and burn them. So then how do people realize that this is the reason they were not raptured? Imagine some apostate church is having a big Halloween party and not a single person is raptured. Imagine all these people in the streets on Halloween and all of a sudden they see the rapture, not of anyone with a costume, but of all the saints. That would drive home the point.
17 And there shall cleave nought of the cursed thing to thine hand: that the Lord may turn from the fierceness of his anger, and shew thee mercy, and have compassion upon thee, and multiply thee, as he hath sworn unto thy fathers; 18 When thou shalt hearken to the voice of the Lord thy God, to keep all his commandments which I command thee this day, to do that which is right in the eyes of the Lord thy God.
If you are dressed up in a costume then the cursed thing is "cleaving to your hand" and so you will feel the fierceness of the Lord's wrath.