By that I mean the post 1989 governments and politics. Nationalism, clericalism, and anti-Semitism became a quite visible, but not the dominant tune.
>
> But I was under the impression that there was a fairly virulent
anti-semitic
> purge inside the communist party in 1968 in the wake of the 6 Day War,
when
> about 10 or 20,000 otherwise loyal communists had to leave the country,
much
> to their shock, the most famous among whom was Zygmunt Bauman.
I think that ant-Semitism of that period was a red herring, because the real story was the internal party struggle between reformers and hardliners. The reformers got an upper hand in 1956, but their power started eroding throughout the 1960s. 1968 was marked by student and intellectual protest across Europe, and the winds of that protest did not pass Poland. The hardliners fought back (and temporarily won) - using any dirty trick on the book, from organizing goon squads to beat up student protesters to character assassination (including anti-Semitic innuendos) of prominent intellectuals, and to expulsions from universities.
You are right that many of these intellectuals left the country at that time - but saying that this was an anti-Semitic purge is a gross misinterpretation of events. You have to realize that most of these people did not think of themselves as "Jews" (which is mainly a religious identity in Poland) but as progressive reformers and intellectuals fully integrated to the socialist society.
Many may disagree, but socialism was a brain child of the Jews and was an attractive alternative to both Zionism and the orthodox identity.
You may also want to consider the fact that other communist countries, notably China faced a similar situation around the same time - a strong push for a reform from within the progressive intelligentsia, and the hardliners fighting back using populist, anti-intellectual appeals. In China, it was the Cultural Revolution.
The reason I am mentioning it is to show that 1968 was caused by systemic problems of communist governance. One was an inherent conflict between the old-time hardliners with their power base in the rural masses, and the new urban classes, especially the intelligentsia. Another structural problem was declining economic performance of the centrally planned system in virtually every communist country. These problems created a lot of upheavals and internal power struggles. Blaming these upheavals on 'anti-Semitism' or other cultural identity is pure bullshit invented by identity politics hacks.
Wojtek