AOC, for all her faults, has never robbed banks or killed policemen. The IRA, of which Sinn Fein is a part, has done both of those, within the boundaries of the Republic of Ireland.
The Weathermen did bank robberies and killed cops, and Bill Ayers is a beloved mentor to Barry Obama. And Chesa Boudin is D.A. of San Francisco. So don’t assume that Sinn Fein is worse than some elements of the Democratic party.