When we say that Zen is not Buddhism, not Mahayana, or that there is no Zen meditation, we aren't just echoing that infamous Phd from Japan Dr. Hakamaya and the Critical Buddhists who attacked the idea that Buddhism was whatever anyone believed. www.reddit.com/r/zen/wiki/hakamaya.

When we say that "Buddhism" and "mahayana" are religious doublespeak, it's because 1900s Western religious academics couldn't define "Buddhism", and avoided the issue to advance their careers. www.reddit.com//r/zen/wiki/buddhism

More than anything else though, the problem is that Mahayana Buddhism doesn't produce Buddhas, and that's the only purpose of Zen Master Buddha's teaching. Zen Master Buddha got enlightened and passed that enlightenment onto others. No enlightened, not Buddha teaching.

One day Councilor Wang visited Linji. Together they stood looking in front of the monks’ hall. Wang asked:

“Do the monks in this hall read the scriptures?”

The Master said, “They do not read the scriptures.”

“Do they study Chan?”

“They do not study Chan.”

“If they neither read the scriptures nor study Chan, what, ultimately, are they doing?”

The Master said:

“I simply have them become buddhas and become patriarchs.”

How do we know Zazen doesn't work?

*1900s Zazen "masters" had sex problems

• www.reddit.com//r/zen/wiki/sexpredators *1900s Zazen "masters" lied about history and their religion

• www.reddit.com//r/zen/wiki/secular_dogen *1900s Zazen "masters" lied about meditation helping people

• www.reddit.com//r/zen/wiki/meditation_science

   Most of all, nobody can defend any of this
   and mahayana meditation teachers don't even try.
  

Nowhere on the internet do Mahayana Buddhist meditators answer any and all questions about their history, doctrine, or practices.

Because Mahayana Buddhist meditation is a scam, like Scientology.