More from Cornwell, p 110:

Meanwhile two Catholic journalists, Fritz Gerlich and Ingbert Naab, excoriated National Socialism in the pages of the Munich-based periodical 'Der Gerade Weg', characterizing the movement as a 'plague'. In the issse dated July 21, 1932, the writers declared that "National Socialism means enmity with neighboring countries, despotism in internal affairs, civil war international war. National Socialism means lies, hatred, fratricide, and unbounded misery. Adolf Hitler preaches the law of lies. You who have fallen victim to the deceptions of one obsessed with despotism, wake up.'

So why did Pacelli seek an accommodation with Hitler?

Primarily because of other enemies.

Cornwell, p 112:

"Lenin, and Stalin after him, had never concealed their intentions. They had declared war on religion itself and the Orthodox Church in Russian had suffered widespread murderous persecution at the hands of the Communists since 1917. Bishops and priests were jailed and murdered; churches were despoiled and destroyed or turned into atheist museums; the schools and the press were exploited as a means of vilifying religion.   It became a crime to teach children under sixteen about God."

"Although Roman Catholics in Russia numbered no more than 1.5 million and offered noo threat to the regime, the Catholic Church was no less a victim of Bolshevik persecution."

"By 1930 there were no more than 300 Catholic priests in Soviet Russia (compared with 963 in 1921), of whom 100 were in prison."