He was even casting aspersions
No, wikipedia was... Kazcmarek was innocent of the trumped-up espionage charges the stalimnist regime had cooked up. Anyway, this is common knowledge and public domain available to anyone who wishes to find out.
Kaczmarek was not the only prelate victimised by the Soviet-installed and Kremlin-cotrolled puppet government. Read up on the three years of Primate Wyszyński's incarcertion. There was even a TV play about it.
All in all, you have entrenched the view that the PC dictatorship is the direct heir of Stalinism. Same type of arguments and tactics -- guilt by suspicion and innuendo, casting groundless aspersions, generating false rumours... The only difference is the lack of physical reprisals but, if things continue the way they are now going, that too will come. Already Catholic adoption agencies have been forced to close down becuase they insisted on entrusting orphans only to married couples and not on demand or whim. That's still not as 'dynamic' as beating up or killing people in dark back alleys, but it's a step in the 'right' direction!
Since the IPN was mentioned, that institution has for years been compiling documenation on the lawless, incarceration, torture and cooked show trial of Bishop Kaczmarek. Those who read Polish will learn that the Good Bishop was tortured to exact false confessions, beaten, starved, threatened, intimiadated, pulled out of his cell at night for many-hour-long interrogations, in winter confined to unheated cells with wide-open windows. Commie torurers were indeed worthy successors to their Gestapo predecessors.