DENVER (AP) — From the moment conservative activist and icon Charlie Kirk was felled by an assassin’s bullet, partisans began fighting over which side was to blame. President Donald Trump became the most prominent to do so, tying the attack to “the radical left” before a suspect was even identified.

It was part of a new, grim tradition in a polarized country — trying to pin immediate responsibility for an act of public violence on one of two political sides. As the nation reels from a wave of physical attacks against both Republicans and Democrats, experts warn that the rush to blame sometimes ambiguous and irrational acts on political movements could lead to more conflict.

“What you’re seeing now is exactly how the spiral of violence occurs,” said Robert Pape, a political scientist and

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