Rationalizing is abandoning what’s in front of us for why it makes sense or doesn’t work. It is caused by suffering and pain, by being mistreated or the perception that you’re being mistreated. From the perception of buddhadharma it’s a teaching. If you are a student, there are much, much deeper levels of learning and understanding. The understanding goes way beyond what arises in dependent origination, which creates the illusion of separation. You can’t change it so that you no longer rationalize, but you can stop covering it up. Through the practice of shikantaza, see the illusion that arises out of pratitya-samutpada and stop going to war with it.
https://www.youtube.com/watch?v=HrSK_RRzqFE