No, not yet. The attempted assassination is arguably approaching the effect of John Brown’s raid on Harper’s Ferry, which I consider the boiling over of nutcases but not actually the start of of the Civil War. In this case, Hodgkinson is just some hysterical Bernie supporter acting on the suggestion of killing Republicans; he is not a level-headed (albeit grossly misguided) leader.
Civil War II will begin when there is an organized assault on legitimate core sociopolitical power structure. Had this nutcase succeeded, or if we find there are more level Leftist heads behind this “lone wolf” attack, we’d be approaching that point.
So no, not Civil War II. Yet.
I’m wondering if the Scalise and company were always the target. Be interesting to know when the perp arrived in the VA/DC area...