Even if there is a "psychedelic community" in Israel that approves of "magic mushrooms," that is not an indication that Judaism approves of it. In nearly every country there is a small group of people obsessed with psychedelic drugs, and they pretty much approve of them all. Since they are ideologues, they have no credibility. Don't listen to them.
These mushrooms were not known to people outside of Mexico/Central America until very recent times. So the Torah says nothing about it. But major gedolim such as R' Moshe Feinstein have said not to use marijuana (which is a mild hallucinogen so it's also a psychedelic). And there is no respected Orthodox rabbi I'm aware of who has approved of any illegal drug use.
Common sense, scientific evidence and common experience also should keep us from using this drug. As with any psychedelic drug, there are grave risks of severe, long-lasting psychological problems, such as permanent perceptual changes ("hallucinogen persisting perception disorder" or HPPD), panic attacks, and anxiety problems. There is also the danger that one will have experiences which one thinks are genuine spiritual experiences but in fact are misleading or dangerous. For this reason, some kabbalists (such as Rabbi Ariel bar Tzadok) do not take anyone as a student who has used psychedelic drugs.
The Torah requires us to guard our health. That includes our mental health, of course. So we should avoid all illegal drugs, and psychedelic drugs in particular, like the plague.
If you want an interesting or transcendental experience, Judaism provides traditional means for doing so: prayer, meditation, fasting, wine, dancing, music, etc. These are safe in moderation. There's no need to experiment with dangerous drugs.