The assassination attempt on former President Donald Trump’s life has rocked the key swing state town where Democrat voters admit they’re afraid to voice support for Vice President Kamala Harris, according to a new report. Residents of Butler, Pa. — the town where Thomas Michael Crooks fired an AR-pattern rifle at Trump and lost his own life as a consequence — report “unnerving” threats and increasingly violent rhetoric as tempers flare over the upcoming election, the Washington Post reported Monday. “People that come in are very afraid and very angry,” Barbara Davidson, a manager for United R…