Christianity was founded as a monastic, ascetic, apocalyptic sect in antique judaism, and got the shape recognisable to most of us through roman imperial politics. If you think those jews or romans used psychedelics I'd like to know why.

There might be traces of cannabis in the hebrew Bible but it's not a common theme and pretty much every word this idea is usually based on could be a reference to something else.

There are religions using psychedelics, some of them probably quite old, but none of the big, popular ones do. In part this is explained by european (and similar) traditions surrounding government, which tends to be very suspicious of strong feelings and competition from drug use when it comes to the loyalty of their subjects, so for a religion to become a societal institution it has to get rid of the drugs if there are any.

Edit: As for modern interpretations of e.g. LSD as a religious experience says more about cultural poverty and millenia of ideological subjugation than the experience itself.

There is a strong case to be made that Jesus was basically a rip of Dionysus; ritual cannibal sacrifice (eat my body and drink my blood), son of zeus (son of god), born to a virgin when visited by an eagle (born to virgin mary when visited by a dove), resurrection in the spring (Easter), both turned water into wine, and Dionysus wore a crown of thorns.

Dionysian festivals, although not proven (it's hard to find samples of ancient ritual wine), are strongly suspected to mixed something psychedelic (probably ergot) into wine as part of their ceremonies. Of course, that trance inducing wine was the blood of Dionysus. And how could it not be? You drink it and feel the essence of a god right after (the trip).

Sounds like pretty shallow Holy Blood, Holy Grail stuff to me.

It is fairly firmly established that roman mystery religion shaped some of early christianity, in particular the Mithras mysteries.

It's hardly any more conspiratorial than roman influences on Christianity, John the apostle spent a long time in Greece and wrote revelations there. Never mind the Church would actively integrate local cultural iconography into the bible to make it's spread more palpable.

Dionysian mysteries were popular in large portions of the Mediterranean at the time. Very little of what you mentioned was unique to dionysian practices and beliefs, so you'd need to have more than the immediate likeness as evidence.

What do you mean by "the Church would actively integrate local cultural iconography into the bible to make it's spread more palpable", can you give some examples of such iconography?

My goal here isn't construct some theory I cooked up, my goal is to make you aware of scholarly research that links what is assumed to be old psychedelic driven religion with providing many of the inputs to what became christian lore.

OK then, maybe name some monographies and articles?