I haven't seen signs of a lynch mob yet, although Christine is right to regret anticipating imprisonment and violence against Julia's uncle.
For myself, I regret that a number of us used the p word to insult her uncle, not because I think that it was unfair or inaccurate but because it was unnecessary. His own words and actions are far more damning than our necessarily restrained language.
Tatiana was sweet, in her first response, to hope for love and reconciliation, especially if she was aware that the latest incident is just the most recent and most sinister in a long campaign of harassment that included Julia's uncle confronting her in her workplace. I admit that until the latest incident, I myself hoped that with GRS being a fait accompli, the reason for the harassment would end and Julia's uncle would become reconciled to her being a woman. Although it was Tatiana's first reply that gained praise, I think that her more restrained second reply is wiser.
Sephirah's advice may also be wise, especially if Julia's uncle is just a run-of-the-mill bully who happened to pick on his niece and will just pick on someone else if he fails with her. However, even if he is a run-of-the-mill bully, and I am not sure that he is, ignoring him will not necessarily end his harassment. Many bullies really do not like being ignored and their behaviour can escalate.
Cindy was right about Julia showing maturity and strength. This is shown, e.g., by the fact that she considered not telling her father or brother about the incident, in the hope of shielding them from her problems. I think that she was right to tell them, though, as escalating harassment is a danger signal. Cindy was also right to caution us to use restrained language, although as I said, I haven't seen signs of a lynch mob yet.
However, only Julia is in a position to say whether she is safe.
Although we cannot presume that her uncle intends Julia any physical harm, we also cannot declare that he does not pose a threat. Intentionally or not, he has already put her in danger. Reasonable people know that if they upset somone who is about to drive a motor vehicle, they are putting the drivers and others on the road in peril of their lives.
Julia's father has shown exemplary restraint and I hope that he continues to do so but his brother has ignored past warnings, so he may feel safe enough to continue his harassment. Also, Julia's uncle may be able to talk his way out of trouble with her grandparents. After all, he is their son and what parents want to believe the worst of their child?
Julia, if your uncle follows you outside again, consider walking back into your grandparents' house and asking one of them to escort you out. If he restrains or impedes you, shout for help. A loud whistle might be useful, especially if your grandparents recognise it as a signal.
