i dont know
its obviously way too big an issue to be decided by anyone here!
i imagine we can all agree on this.
nevertheless, Rabbi Avigdor Miller, ztl has stated many times that reform are reshoyim, they are not our brothers, they are technical Jews but they are not Jewish, they have no chalik in Olam HaBah, and other similar statements. whether he was referring perhaps only to the leaders or only to the followers, i never heard him make a distinction.
i suppose other great leaders of the Jewish People might have a different understanding, or might express a different understanding publicly not to offend or cause a widening rift. Rabbi Miller, ztl, was a man who always spoke the plain Emes, he was a knoi for the Ribbono Shel Olam. I never doubt, chas v Sholam, anything he said or wrote.