On p. 43 of Murphy's translationhttps://ia801807.us.archive.org/26/items/MeinKampfEnglish/mein-kampf-english.pdf of Mein Kampf, Hitler declares:

"Then a day came when the more redoubtable of my adversaries resorted to the most effective weapon they had to replace the force of reason. This was intimidation and physical force. Some of the leaders among my adversaries ordered me to leave the building or else get flung down from the scaffolding."