“It bothers me when Chanadniks try and justify their Minhagim to the Litvish world. I think they should be firm in their customs and not worry what other communities think.”
The problem is that this would require them to think are mesoras are equally valid, which they don’t. They aren’t trying to “justify” their minhagim, they are trying to prove their supremacy.
“No one ever makes a big stink when certain communities daven Shachris on Shabbos at 11am because their rebbe is “beyond time”.”
Sure we do. It might not be as noticeable to you since those communities aren’t also on the mission to convert the universe to their way.