GR question

[Paul Mackin]

A friend sent me the following, which I'm not sure I see the significance of.

Although nothing was very explicit I at least half understood that
Katje was supposed to be a Nazi double agent.

His message was as follows:

I hope you had a nice 4th of July.

Big problem in GR.
Katje Borgesius Slotrop's "lover" and member of
the Dutch Underground would have been a Nazi double agent
according to David Kahn's  _The_Code_Breakers_

In the case of the Dutch  the
Nazi Counterespionage Service (Abwehr)
had "flipped" (or snuffed out) most of the Dutch Underground.
And even worse the Nazis had "flipped" the whole Dutch Resistance
Clandestine Shortwave Radio Network and
used it to feed false data to their British handlers and
used it to lure many a British agent to parachute into
capture.

The Nazis were so subtle that they used a "phoney"
Dutch Underground to help an occasional flier brought
down in a Allied bombing raid to Spain and freedom.
And such fliers would "testify" to the bravery and
honesty of the Dutch Resistance!

Poor Anne Frank never had a chance.