Michigan mom and leukemia patient Julie Boonstra already had her run-in with the tolerant Left. Boonstra, who filmed an ad about her struggles with Obamacare for Americans for Prosperity, was targeted by Michigan Rep. Gary Peters, who threatened to sue her into silence. That wasn’t the end of the attacks, however. Slade O’Brien, southern regional director for AFP, shared this letter sent anonymously to Boostra. …