Want to bet that Susan Hayes, who plays Julie, was undoubtably doing a lot of eye rolling when she got her scripts for those scenes.
So yes, the writers have Julie feeling that poor Nick was trying to turn his life around. He loved Gabi, just wanted a life with her. Julie chooses to ignore that Nick was minipulating Gabi, trying to take Arianna from Will, was trying to control everything.
No, she does not know about all the various blackmail things, neither does Hope. Nor the attempted rape. Nor Percy, the blackmail pics, etc.
So, from what she does know, Julie feels that Nick had not done anything that would cause anyone to want to kill him. Julie needs to sit down and think a bit, and realize that there had to more, and folks are not talking. But then, being Julie, she would suggest to Hope, and Maggie, and before you know it, others would be in deep doo doo, so this time......Julie is the bad guy. It truly is a shame, but then.....those 3 women should actually be beating themselves up for not watching Nick a bit better......look at Rafe now.