How to 'get over' finding out your ancestry is not what you were told?

[erwoo]

I was brought up being told that my great grandfather was Jewish. I recently took an ancestry DNA test, and I now know that this was not true. He had lied about his origins after 'running away' as a young man. He was actually from Newcastle. Growing up, this was a big part of my identity, as my grandmother was raised with stories about grandparents escaping from Russia et cetera. Now we know it is all a crock of

Could he have deleted the account.

He wouldn't have to delete his account. You can just go to the settings in Ancestry and set your matches to off. So that person won't pop up as a match to any other people in the database. Would imagine other sites do similar.

I got my results today after a lifetime of being told I'm Jewish. 99.9% British and Irish. And more neanderthal than most users. Excellent.

I understand this OP. My dad is Jewish and I was told lots of incredible stories about his grandparents in particular and their journey across Europe. But yes, if it's in your DNA, it will show up on Ancestry (mine did).

There was so much overt, unhidden persecution of Jewish people then. It would seem quite strange to make that up. Is there a possibility he converted?