Truly, I'm not in the habit of assigning generalities (good or bad) to cultures, but, having said that, I have experienced some very unsophisticated and antiquated remarks from particular regions on these boards.
And at the same time, just as many ignorant and hateful remarks from posters on this site, who live in the developed world. Perhaps the people from faraway lands, with English as their second language, deserve a bit more leeway.
But to JA's point, yes, it still sounds like the Original Poster (OP) is looking down at the concept of bisexuality, but he may have very few resources from which to develop an opinion.
Actually, interesting and cogent ideas from all – lee, raph, tt, -- god, what fucking magnificent armchair sociologists we are!