Was Thích Quảng Đức an arahant despite being a Mahayanist?

[ekocare]

@LifelessAtta

My second doubt concerns this other sutta:

“So, Reverend Channa, …

Not long after those venerables had left, Venerable Channa slit his wrists.

You should remember this: ‘The beggar Channa slit his wrists blamelessly.’"

MN:144

Please see here.

Suicide: Sutta versus Commentary

144. Channovādasutta
Advice to Channa

So what does the commentary say?

394. Satthaṃ āharesīti jīvitahārakaṃ satthaṃ āhari, kaṇṭhanāḷiṃ chindi. Athassa tasmiṃ khaṇe maraṇabhayaṃ okkami, gatinimittaṃ upaṭṭhāsi. So attano puthujjanabhāvaṃ ñatvā saṃviggo vipassanaṃ paṭṭhapetvā saṅkhāre pariggaṇhanto arahattaṃ patvā samasīsī hutvā parinibbāyi

A rough translation summary is below:

He used the knife to take his own life. He cut his throat. Then at that moment, fearful of death fell upon him. The gati nimitta (sign of death-destination) appeared. He realized he was not enlightened and knowing that, he got the urgency in dhamma and practiced vipassana. Fully grasping by knowledge the saṅkhāre he reached to become an arahant and attained parinibbāna.

Many people dispute this explanation and that is why people who are suttanta kill themselves.

@LifelessAtta

Do you think he is arahant, or at least sotapanna, despite being a Mahayanist?
More broadly, do you think a mahayanist can become an arahant (or at least sotapanna)?

No never, according to Theravada.

@Trobinson465

No ariya could commit suicide as they cannot break the 5 precepts

Suicide is not included in 5 precepts. It is not Killing. Suicide is a minor offence for monks.

But Venerable Thanissaro’s BMC incorrectly include a type of suicide (a bhikkhu asking someone else to kill the bhikkhu) into the 3rd Parajika (Murder).