Hi MJ, just read through the link you posted and this is my view:
When it comes to foods like quinoa which are talked about a lot, there are always going to be some people who absolutely love it and some who absolutely hate it, and there are often people on both sides who are very keen to get their beliefs across to other people. I'm not saying this is a bad thing. I think its good to be aware of what you eat.
But sometimes I think the debate and publicity goes too far. As long as we are eating balanced diets and getting the nutrients we need for good health, I don't thinking including quinoa in a meal two or three times a week can be that bad. I know some people who eat it almost every day, and they don't show signs of any detrimental effects.
Whenever I hear stories like this, I am always reminded of my grandfather. In his day, food was food and you ate what you could get because there might not be another decent meal for a while.
Sometimes I think we are getting so obsessed with analysing foods that we forget to just sit back, enjoy it and be thankful that we have it at all.