Sakkaya ditthi is also described in the sutta below. It also describes how does sakkaya ditthi leads to affliction and how ending of sakkaya ditthi leads to the end of affliction.
https://suttacentral.net/sn22.1/en/sujato
It is exactly like i say. That is not really important, but is not oke to become so judgemental and suggest Siebe does phantasize his own Dhamma or even hinduism.
Most important, what is said here in this sutta can be verified by ones own experience. One can really understand from this sutta why breaking with the habit of sakkaya ditthi is so important.
Siebe