I think romeo will tell Juliet what happened. and she will understand

I think Juliet will be disappointed in Romeo but will still love him because he has a way with words

I think hes saying that the rivalry between those two families ended up killing them and he wishes death on them

During that time, killing somebody probably wasn't as big of a deal as it is now. I think Juliet would be disappointed but would get over it

yes...he knows that this stupid fight has caused his death and he's probably making a prediction that it will happen again