I remember reading that some Jews were saved because official records of their Jewishness were destroyed by archivists, although I'm having trouble finding a source for that right now. Still, point remains that an indelible decentralised ledger can be used for evil as much as it can be used for good.
Moving away from Godwin, and reiterating a point I made earlier, the malicious usage of indelible records can also come from non-state actors. There are websites like Kiwi Farms which are just full of people who have nothing better to do with their pathetic lives than troll and harass people for their own entertainment. Imagine coming under the attention of such perverts and finding it even more difficult, if not outright impossible, to escape their stalking of you because they can keep copies of your dox permanently out of the reach of legal authorities.
We already live with computers. So your point is moot. If a future government decided to go after Jews, it could do so with centralised records.
Also, there are ways for people and good politicians to better safeguard data from future tyranny.
There is blockchain data implemented badly, but also blockchain data that is implimented well.
For example health. It's possible to devise a system where patient's data is encrypted but can only be UN-encrypted with the patient's permission, or with the permission of an ICE contact.
The same is true of ALL data.
So it would be like carrying your data around with you. Of course there a circumstances under which it could be forced off you, but in future, there will be all sorts of solutions where it can't be.
That's way better than a future tryannical government with the data at it's fingertips without your prescence.
Let's also remember, that centralised data now, is incentivising people with power to move in the direction of accumilating power by pushing forward with more centralised systems.
The ONLY way to reverse all of this, for normal people and entities to adopt as many decentralised systems as they can, including systems that self custodies data.