KENOSHA, Wis. — The first man shot and killed by Kyle Rittenhouse on the streets of Kenosha was acting “belligerently” that night but did not appear to pose a serious threat to anyone, a witness testified Friday at Rittenhouse’s murder trial.Jason Lackowski, a former Marine who said he took an AR-15 semi-automatic rifle to Kenosha last year to help protect property during violent protests against racial injustice, said that Joseph Rosenbaum “asked very bluntly to shoot him” and took a …