Then you are talking to Catholics who don't know what they're talking about. "Christianity" is the umbrella in which other denominations reside - Catholic, Protestant, Baptist, etc. They are all Christian. There is no "standard" Christian denomination that a Catholic would feel the need to say there is a difference in comparison to. Sure, people might want to
specify what denomination they are, but that's different than a Catholic saying they "aren't" a Christian.
Like above, "Orthodox Judaism" is an umbrella label for smaller denominations; in this case, Hasidism. Hasidism is a form of Orthodox Judaism. There are differences, of course (otherwise it wouldn't be an off-shoot of it); but those differences do not invalidate its Orthodox origin, so to say that they are not Orthodox is inaccurate, since they still fall under that banner. 'Sa'll I'm saying.
But all this is neither here nor there; its not the point of this thread.