NO, but only IF their actions were justifiable in the situation. ... That is a justifiable action that they shouldn't be held accountable for, ...
It is false that academic arguments should be written in first-person perspective. Nothing should be written in first-person perspective when it comes to academic writing.
Some ideas for this could be: Romeo and Paris have similar wealth and social status, different ages of the two of them, Romeo changes his love interests but Paris focuses solely on Juliet through the entire work, and along those lines, Romeo is emotionally unstable whereas Paris is relatively confident. Good luck!