The establishment leaders who lived during the time of Abraham want to slay him because he has enlightened the people and led them away from the futile path of Idol Worshipping. People like Abraham, who dare to initiate positive change and help others in their spiritual awakening, always encounter opposition from forces who seek to propagate chaos and ignorance for their own personal gain.
Throughout human history, any major advance in civilization was first met with opposition, defiance, and scorn from those who would not benefit by the betterment of the human condition. This spiritual principle holds true in our own personal life. As opportunities for spiritual advancement present themselves to us, there will be obstacles and opposition. This passage gives us protection from the forces that attempt to impede our spiritual progress.