I like conspiracy theories... alas I have only a question, but give me time and I'm sure I could work it up
Since the US continuously tracks all satellites (and lots of debris) surely a collision would have been predicted before it happened and e.g. Iridium warned to take avoiding action - unless one satellite manoeuvred suddenly...
So - whodunnit? Was it -
a) a US anti-sat operation using an Iridium satellite (possibly specially hacked and redirected, possibly with connivance of Iridium.... ah! Got to a conspiracy at last!)
b) a Russian anti-sat operation... etc. etc.
c) a CHINESE anti-sat AND hacking operation
d) a 4Chan stunt
e) clumsy Reptilians
.....i) Arriving in time to pick up the pieces of the (crisis of your choice),
.....ii) Departing in time to avoid the (crisis of your choice)
f) a Banker
Oh look! The sky IS falling.