Ah… I remember the olden days where I was accused of heretical Nihilist views when I said that nothing exists after parinibbāna. Ven Kumarabhivamsa was attacked too. Like some punk thought he knew more about Buddhism than an abhivaṃsa scholar. They make 6 of these degrees per year out of 300,000 monks. (at that time…6 out of 500,000). Plus he is a pa-auk meditation teacher. We had to delete the comments… and then Mistakes of Pa-Auk suddenly appeared with his own channel.
If you say there is nothing after Parinibbāna, they accuse you of Nihilism.
In short and simple English… the wrong (Nihilist) view negates attainments and kamma and the causes for rebirth or even saṃsāra. The Nihilist believes that there is a limited number of births or even only this current birth regardless of removing the causes for rebirth. They also believe this regardless of morality, etc. It is a very dangerous wrong view.
However, when those causes are removed with wisdom and the fuel is no more, then the 5 khandas pass away and do not arise again.
The Eternalist who belive that Buddha lives in Nibbāna is another wrong view. The angle is to show the difference between Nihilism and Parinibbāna.
The problem is that those who assert in The Buddha living in Nibbāna believe in this Thai Forest Citta thing. It is some type of Sixth Khanda. When you encounter people like this, there is nothing you can say to them to convince them otherwise. I think this borders with Mahāyāna stuff as well. It is nonCT headache stuff like this that caused me to give up on dhammawheel and help create this group with @RobertK.
Here is an article I wrote long ago.
As for Suttanta Buddhists… the Citta thing especially in the Thai Forest Bible, causes this to arise. That is another reason why they think the commentaries and abhidhamma is wrong. If CT is correct, then the biography is wrong. (notice I say biography).