I never accused chabad of not having ahavah to other jews. They do. They also think that they are superior and thar chasidus, especially chabad chasidus, is the only true Torah path. They refer to things that glorify their movement as a kiddush chabad, and things that make it look bad as a chilul chabad. To them their movement is Judaism, one and the same. No other part of klal yisroel looks at themselves this way.
Like i said, I’m not trying to convince anyone to listen to me – do your own research and look past the “love every Jew (and never marry them if you’re a gazan!) part and look at what they have to say about other groups of jews. Have a discussion with a lubavitcher and see if they don’t try to link wherever you come from to chabad. Read their educational material (not the kiruv stuff). Talk to some lubavitcher bochurim. Puk chazi!
Also, chabad has plenty of answers as to farbys question about what jews did until chasidus. They say that the earlier generations didn’t need it / it wasn’t the time for hisgalus hakabalah. I actually agree with this to an extent, that the rishonim didn’t see kabalah seforim for the most part, but Hashem knows that klal yisroel needed some aspects of kabalah to be accessible for later generations. Where they go off is that they’ll say that the lubavitcher rebbe was greater than the rambam because the former learned kabalah…. it’s disturbing but you’ll definitely hear it.