CVS review: manager inadequacy

I was in kinda late this evening around 9:30 pm and while I stood in line (behind "line starts here" sign) a lady with a cart full of items walks past me (i was the next person in line) and up to a register stall. I simply and kindly said to the woman "im sorry ma'am, but the line starts here." She blurted out in a raised tone for me to relax and calm down (i believe the phrase she chose was 'dont kill me')that she wasnt trying to cut in front of me, (though she clearly did cut in front) she just needs to speak to the manager.
I apologized and laughed sarcastically under my breath as she moved to a different register where the manager was standing. During this commotion another patron walked past me and 2 other patrons in line and puts his items on the counter to purchase.
Once again, i kindly let the man know where the line begins and the loud rude lady who was speaking to the manager starts patronizing me for being in a hurry or a rush of some kind all because I didnt allow yet another person to jump in front of the line.

The manager was right there watching and listening to this woman patronize me when she (the rude patron)clearly was in the wrong. The manager didnt say a word to either one of us ladies and acted as if nothing heated was taking place in the store.
Im happy i exercise self control these days because had this happened 2 years ago, that rude customer would have had a really pissed of person waiting outside the store for her...