and because of this - he sued so much people?
You'd do exactly the same if people were publishing and saying all sorts of dreadful lies about you. Polonius will be next if he doesn't behave himself, especially as by his own admission, he's posting from Poland right now.
All the KOR-ites availed themselves of the hosptiality of Church premises (churches, rectories, catechetical centres), etc. for meetings, lectures and oterh activites after martial law was declared.
The Church needed him as much as he needed them - Solidarity was always an uneasy alliance, but one that worked given the circumstances.
As for "anti-clerical fury", perhaps you'd like to link us to some examples? I've never heard Michnik say a bad word about the good things that the RCC do.