His daughter hid inside and called police, he said, terrified her "former so-called friends" would eventually force their way indoors.
Police arrived and the teens scattered after one of the boys was arrested.
Mr Longshaw immediately took his daughter to a family member in another region, and returned home about 2.30am to find his letterbox destroyed and rocks thrown through five windows along the street-facing side of his uninsured home.
He said a neighbour had heard the windows shattering and told him there had been shouting and somebody screaming out "you murdered my brother".
At noon yesterday a group of about 15 teens again appeared at his gate, he said, and were wearing gang colours and "threatening to run me out of town and kill my daughter".
"But I've been here for more than a year now. I have to stand my ground. I'm not running anywhere," he said. "They can't just go around threatening people. They're just ruining the community and this needs to be addressed, before somebody else gets hurt or dies."
Mr Longshaw was sure the teens would come back before Hoani and Pacer were farewelled, and he could not risk leaving home and paying his own respects as planned.
His neighbours Colleen and Ron Randle, who have lived in the town for more than 50 years, said they had become involved with the teens who returned yesterday after Mrs Randle asked them not to swear.
The 76-year-old said the teens turned on her and threatened to return and damage her property as well. Mr Randle said the couple had not taken the threat seriously and were confident the police would handle any danger.
They also had faith in the town they have called home for most of their lives, and the people of Featherston.