I've never understood why there was so much name changing among jews in the post war period?
Very good question!
Considering that you, nor anyone else, can show us that 'Jews were exterminated by the Nazis', your question is illogical. Some would simply say that since it's known that millions were not exterminated as alleged, the 'where did they go' question is senseless, and yes, a canard.
The mere fact that 'holocaust' celebrities such as Yehuda Bauer, a former head of the Yad Vashem 'holocaust' Theme Park make statements that the alleged number of Jews under occupation were much lower than what other Believers state, and the fact that he makes it clear that the Wannsee Conference was not what is claimed should give anyone pause. It is the endless conflicts within the tales spun by those that profit from the 'holocaust' that make Revisionists simply messengers.
What can be shown with ease is that the Jews in question were not 'exterminated' as alleged, very simple. Until such time that Jewish supremacists can prove their allegations of '6M, gas chambers, and massive pit shootings', they haven't a chance in rational debates.
Remember, Revisionists are former Believers.
Ok, then, let's assume that you are right on principle, that there never was a Holocaust per se. So, no 6.000.000, no gas chambers until proven, and "less massive shooting than believed. Let's say thus that you won the debate. Our theoretical position is now that the Holocaust as presented for years has collapsed. Ok ? In consequence of this victory of revisionism, History has to be rewritten, you'll agree
So what comes next!
Again, it is well known and not denied (even by most deniers) that trainload of Jews did arrive at Treblinka and other "so called Reinhard" camps. Unless proven, there are no records of any trainload of Jews departing from there for another destination. What is the Revisionist position starting from there? What did happen with them. How would you write history starting from there and deal with some logical and common sense issues that come with it?