Some people are up on their Sun Tzu.........

 

Cause division among them.
-Master Sun

Send interlopers to create rifts among them
-Cao Cao

Seduce them with the prospect of gain, send interlopers in among them, have rhetoricians use fast talk to ingratiate themselves with their leaders and followers, and divide up their organization and power.
-Du You

You may cause rifts between the leadership and their followers, or between them and their allies—cause division, and then take aim at them.
-Zhang Yu

-Sun Tzu, The Art of War, translated by Thomas Cleary