"When and how did the Pope "punish" the indult movement? "
Here's how:
http://www.latinmassmagazine.com/semi-traditionalists.asp
Does the Novus Ordo, even one celebration of it, somehow taint an FSSP priest, like a stain?
This is a pot, kettle, black situation, if you ask me.
Where's the punishment? Perhaps you can point it out - there's no "punishment" of the indult movement recorded in that article.