You really would think so but I’m afraid that one was almost 100% Japanese kookiness, though Aum ShinRiKyo did include religious parts taken from Islam:
That whole matter was muuuuch bigger than the general public knew, and it also involved several other narrowly failed attacks.
I’ll just say their ultimate plans were to gas ALL of Tokyo with Sarin sprayed from a Russian Mi-26 huge helicopter that they bought and did have on site.
For reasons that are unclear they also did manage to buy a Soviet Submarine moored somewhere.
They were also making AK clones and practicing with them.
In short, they wanted to help usher in ARMAGEDDON.
Aum Shinrikyo used to even broadcast their programs on Radio Moscow, and they had a lot of followers in Russia.
Couldn't find photos of their unit, which was in a fenced area, getting maintained and modded out.
At the time there were a bazillion photos of it, but it seems they've all been scrubbed.