This is a plain inference from the passage just cited.

Appealing to the Commonalty of Scotland, Knox next asked that he might
come and justify his doctrine, and prove Popery "abominable before God."
Now, could any Government admit a man who published the tidings that any
member of a State might avenge God on an idolater, the Queen being,
according to him, an idolater? This doctrine of the right of the
Protestant individual is merely monstrous. Knox has wandered far from
his counsel of "passive resistance" in his letter to his Berwick
congregation; he has even passed beyond his "Admonition," which merely
prayed for a Phinehas or Jehu: he has now proclaimed the right and duty
of the private Protestant assassin. The "Appellation" containing these
ideas was published at Geneva in 1558, with the author's, but without the
printer's name on the title-page.

"The First Blast" had neither the author's nor printer's name, nor the
name of the place of publication. Calvin soon found that it had given
grave offence to Queen Elizabeth. He therefore wrote to Cecil that,
though the work came from a press in his town, he had not been aware of
its existence till a year after its publication. He now took no public
steps against the book, not wishing to draw attention to its origin in
Geneva, lest, "by reason of the reckless arrogance of one man" ('the
ravings of others'), "the miserable crowd of exiles should have been
driven away, not only from this city, but even from almost the whole
world." {84} As far as I am aware, no one approached Calvin with
remonstrance about the monstrosities of the "Appellation," nor are the
passages which I have cited alluded to by more than one biographer of
Knox, to my knowledge. Professor Hume Brown, however, justly remarks
that what the Kirk, immediately after Knox's death, called "Erastianism"
(in ordinary parlance the doctrine that the Civil power may interfere in