(one's) hackles rise phrase
Somebody begins to feel irritated, annoyed or angry.
His rudeness really made my hackles rise.
Her disrespectful attitude is the reason why his hackles rise.
Do you see her hackles rise when he said offensive words to her?
To complain that something is unfair or illegal.
To intentionally and spitefully insult or show disrespect for someone
Said to someone who makes you feel frustrated or annoyed
Suddenly become crazy or very angry or lose control
"Hackles" is an old English word that dates back to the 1400s for the feathers or fur on the neck of cockerels, pigeons, dogs, etc which are raised or extended when these animals are in an aggressive mood. According to the OED, “to show hackles” is a now largely obsolete expression for to show fight that dates from the mid-19th century. “To raise one's hackles”, “to make one's hackles rise” or “get one's hackles up” all mean to show annoyance or anger and these figurative usages date from the late 19th century. Different colored hackles made of cockerel feathers have traditionally been worn on the caps of many British Army regiments down the years. Perhaps the most famous is the red hackles still worn by The Black Watch, now the 3rd Battalion of The Royal Regiment of Scotland.
Friendships will develop well and be successful when the friends respect each other's privacy.
You should respect your friend's privacy. A hedge between keeps friendship green.