Top 20 Most Jewish Countries

There actually was a pretty massive Jewish population in Russia... most of them left because of virulent racism there and they or their descendants are now living in Israel, the United States, Canada, the UK etc. Mostly Israel and the United States.

Me too :/

It was around 0,5% before 1933.

North and South Holland are provinces; using Holland instead of Netherlands is similar to referring to the US as Texas.

Speaking as someone with both Polish and Russian ancestors...Polish Jews had a 1%-1.5% survival chance during the Holocaust. (This is as low as it gets. The prewar population was 3 million). There are lots of reasons for this, but to get you started. Killing camps like Auschwitz were nearby, in Poland. And in Poland's 'Generalgouvernment', murders of Jews were regularly a public spectacle, sadly featuring silence, complicity and even sometimes the voluntary and enthusiastic participation of many locals (e.g. Jedwabne and Tykocin pogroms). In fact, there were spontaneous massacres of Jews without Nazis on the scene (like the Szczuczyn and Wąsosz pogroms). This has all been well-documented. While there were definitely non-Jewish Poles who helped their Jewish neighbours, risking their own lives in the process (Jan Karski is one amazing example), the majority did not, and indeed chose to do just the opposite.