社会反应两极，政治撕裂持续，美称抓住柯克被杀案嫌犯

Core Points - The assassination of conservative activist Charlie Kirk has intensified political divisions in the U.S., with both parties engaging in mutual accusations following the incident [1][6][7] - The suspect, 22-year-old Tyler Robinson, was arrested after being reported by his father, and his motivations appear to be politically charged [3][4] - The FBI reported a significant increase in politically motivated attacks, with approximately 150 incidents in the first half of the year, nearly double from the previous year [7] Group 1 - The suspect was arrested within 36 hours of the crime, indicating a swift response from law enforcement [4] - The incident has led to calls for increased security measures for lawmakers, reflecting heightened fears among politicians [7] - The political climate is described as tense, with the assassination marking a potential turning point in the rise of political violence in the U.S. [1][6] Group 2 - The event has sparked a polarized reaction on social media, with some individuals celebrating Kirk's death, prompting warnings from government officials [6] - Prominent conservative figures have labeled Kirk a martyr, framing the incident as part of a broader cultural war [6] - The assassination has raised concerns about the future of outdoor political activities, as lawmakers express fears for their safety [7]