Did it ever occur to you that if the death camps were all in Poland it may have been because Jews were concetrated there? Or that they wanted to keep it secret from Germans? Or that they conquered Poland first thoroughly, thus didn’t have to fearocals as much and had more time to develop the more sophistacated process required for mass murder?
And since when were Poles the only anti-semites? What about Russia? The French helped round up Jews, though there were no death camps there.
Do you really believe a Treblinka could have operated outside Paris, Antwerp or Rome?