Your problem (mine and of the boys) is NOT that have
non wikimedians in
brazilian chapter. Is because that non wikimedians hostilize every
wikimedian and don't permite anyone discussion... every is taboo.
What kind of organisation is Wikimedia Brazil? Do members not have
legal rights? The way the new Wikimedia UK is being set up, if the
members weren't happy with the way it was being run they could demand
a general meeting and elect a new board (and if the current board
refused to comply the members could take legal action). Is there no
equivalent for the way you are set up? Or is the problem that a
majority of members, not just the board, are non-Wikimedians? In which
case, the answer is to recruit more Wikimedians as members.