I myself am an Orthodox Jew, but if the majority of fellow orthodx Jews did something wrong ( G-d forbid), I would not hesitate to point it out. In fact, since I'm a Kahanist I find myself quite frequently disagreeing w a lot of fellow orthodox Jews (at least on beliefs + for example refuting exilic mindset comes about frequently at shabbos tables I attend lol.
Same here. Actually 1 thing I think is best is to not fight head on (argumentative mode). I often don't do it myself (not argue), but its good to insert our ideas in discussions. People ask to speak (make a Dvar Torah) often I connect it to the teachings of Rav Kahane, Rav Bar Chaim, etc. (also because i'm very familiar and know these teachings- its on my mind).
Some people many times need time to "digest" what is correct and being said. Perhaps once things are said after time the same opponents often quote the same exact things later. Soo no one should loose hope, just continue the fight, say the truth obviously and with time the same people will often say the same exact thing!
Actually come to think of it, I think the same goes for the world as well. The world (and Jews) are to be brought closer to G-D, step by step many times.