Kyle Rittenhouse -- who shot and killed Joseph Rosenbaum and Anthony Huber during a 2020 Black Lives Matter protest in Kenosha, Wisconsin 6 years ago -- wound up in the hospital this week ... after he says he was bitten by a spider. He posted some pics from a hospital bed on Wednesday, writing ... "The communists couldn't take me out and i'll be damned if I let a brown recluse take me out." The selfie shows him hooked up to some monitors, while the other image shows circles drawn around a red