All,
Let’s deconstruct this thread a little bit.
First, popa_bar_abba signed his OP as “the little red hen.” In that story, the little red hen asked some other barnyard critters for help planting wheat, then tending to it, reaping it, threshing it, milling it, baking, etc. At each stage, the other critters refused to help. When it came time to eat the bread, however, all of the critters jumped up to “help”, but the little red hen refused them, and ate the whole loaf herself.
In the blood donation case, the “little red hen” (the OP) can bake the bread but cannot eat it, while the “barnyard critters” (the other posters) can eat or bake the bread but cannot bake any for the little red hen. So, the hen is asking (in popa_bar_abba’s classically inflammatory way), “why should I go through the trouble to bake bread for all you critters???”
I cannot guess what popa_bar_abba wanted as a response. We could thank him for his baking, or mock him for his blood type I suppose:-) I think he was expecting to be attacked for his anti-Semitic tone, but I don’t think he was expecting a wave of “who cares whether you can eat our bread or not… keep baking bread for us anyway because we’re hungry!”
Unlike popa, however, I don’t interpret those responses as a sign of “entitlement.” To be in a position of need is difficult emotionally, so for a giver to act scornfully towards the receiver is cruel. People are responding negatively to this cruelty, but are missing the mark on what exactly about popa’s post is bothering them.