We have good reason to be surprised at this introduction to the subject.

Perhaps we should not be surprised at what has happened.

We must not be surprised if they sometimes end up in public discussion with each other.

We have good reason to be surprised at this introduction to the subject.

We should not be surprised that there is no rhyme or reason to this aspect of our civilisation.

So no - one must be surprised if it acquires a taste for that and continues with its policy of blackmail.