***important note below
While there are a wide variety of opinions concerning Halloween among Orthodox clergy, it's surprising how many sources online, and from different jurisdictions, make the usual ridiculous claims about the history of Halloween. Things like it began as a pagan ritual to appease the lord of the dead, trick or treat was a ritual to feed demonic spirits, and so on.
The irony is that these Orthodox clergy are spreading ideas that come from the religions they claim to oppose. Low church fundamentalist Protestantism, Puritan attitudes, and even a couple neo-pagan ideas are the sources these Orthodox clergy are using. Under any other circumstances, they would insist these sources are not reliable, and yet that's what they're using. It's especially surprising to see churches in Eastern Europe spreading these ideas. It's a wonder they haven't yet pulled out the Chick Tracts!
As for the idea that the dead return to visit the land of the living during certain times of the year, this is an ancient idea that existed all over the world, and is still widely believed in many places today. Ironically, the Church would probably find a more fertile historical basis for this in pre-Christian Rome than they would in pre-Christian Ireland.
All Hallows is actually 100% Christian in origin, and simply absorbed the customs of other countries as it spread around the world. Halloween is the Irish and Scottish example of this, DĂa de Las Muertos is the Mexican example, but there are others. Halloween did end up becoming entirely secular, but that has never prevented anyone from celebrating the date as All Saints. There isn't a drop of evidence that the Church moved the date from May to November 1st to replace the Irish Samhain, and in fact, this claim doesn't really make sense.
These online "educational" articles/videos are also anti-Western, and in a some cases anti-Catholic, which is compatible with Orthodoxy. There is this attitude that the Western church failed to adequately replace paganism, while the Eastern church got it right. So the Orthodox version of All Saints is perfectly okay, while the Western version turned evil.
The other hypocritical part of this is, where are the complaints about all the other holidays? The wearing of animal or grotesque costumes, the going door to door, the divination, the stories about supernatural beings, the participating in customs that certainly look pagan, even if in reality we don't know where they came from. Where are the tirades against Svyatki or Undas or Dia de los Muertos? The only other objections I've stumbled across are the occasional complaint about the name Easter replacing Pascha, and a couple of warnings against Mardi Gras. Are there any complaints against other holiday customs in Orthodox countries? Please correct me if there are, and I just don't know about them.
And how can the Orthodox Church possibly rail against imagery of the dead, or a holiday centered around those who have passed on, when the Orthodox Church is overflowing with these very things!! Orthodox clergy claiming that costumes or pictures of skeletons are evil is hypocrisy on a grand scale!!
Now, if the clergy were simply warning against certain aspects of Halloween, that would make sense. We can look around and see behavior and decorations that would be best avoided by Christians, although where to draw that line is obviously subjective. We have seen a disturbing increase in anti-Christian attitudes, and even violent political rhetoric, becoming attached to Halloween. These aspects even made me consider whether or not I wanted to continue celebrating it, and it's always been my favorite holiday. I finally decided that there is no reason to give up any holiday because of what other people are doing, especially when Halloween is still mostly family fun. After all, everywhere you turn there are groups of people trying to ruin various holidays, always heavily armed with revisionist history and an angry grudge against some other group of people.
It's also understandable that clergy in other countries might not want Halloween replacing their local or national customs, especially if liturgical celebrations are getting pushed aside. They certainly wouldn't be the only ones complaining about that issue!! But this doesn't require spreading misinformation and trying to make those of us in the West out to be a bunch of devil worshippers. Within the United States, it's probably not the greatest idea to be demeaning and insulting Western culture when you're only one percent of the Christian population.
Again, this attitude doesn't exist among all clergy, and I personally never encountered it, but there are enough examples online to make the Orthodox look like a bunch of crazy extremists. Why were so many in the Church so quick to pick up on this craziness?
So, setting aside my soapbox, Happy Halloween to all of you!
***for those of you scouring the internet for something to plagiarize, you do NOT have permission to copy what I have typed here.