I think it is all justification - and if they find the angle that gets you and reels you in, that is the one that they will use over and over.
For me it was the "you pushed me into having an affair because you didn't trust me" and "you pushed me into having an affair because you didn't like how much I was working" (and then tell everyone that is the problem we are having).
I have opened my eyes about these statements and they are to justify things - they may actually believe these things and convince others of it, but does it really matter?
Me-45 W-44 S21, S18, D15 T-27, M-21 BD Jan 2014 PA revealed March 2014 In-house separation - April 2015 I filed - Aug 2015 She moved out Oct 2015