Preemptive Evil

Speaking of Pharaoh's wisdom/cunning to reduce the Israelite "threat" Calvin writes:

"But this is a wicked kind of cunning, (however it may be varnished over with the specious name of foresight,) unjustly to molest others for our own security. I fear this or that person, because he both has the means of injuring me, and I am uncertain of his disposition towards me; therefore, in order that I may be safe from harm, I will endeavor by every possible means to oppress him. In this way the most contemptible, and imbecile, if he be inclined to mischief, will be armed for our hurt, and so we shall stand in doubt of the greater part of mankind. If thus every one should indulge his own distrust, while each will be devising to do some injury to his possible enemies, there will be no end to iniquities." (Calvin's Commentaries Vol. 2, 27)