I have missed all of my vegan friends terribly. I have an ettiquette question for you?

My son was recently married, and I paid for the food that was served at the reception. The food was wonderful and everything was going great until a couple of vegan guests became upset becuase they felt the selection of BBQ for the main course to be inappropriate since they do not eat that sort of food. I was told I should have chosen a food that was universally eaten by both vegans and omnivores. After careful deliberation, I came to the conclusion that I would be able to accomadate the vegans dietary requests. Fortunatley, their was an ample supply of bird seed on hand that was intended to be thrown at the bride and groom when they left the reception. I promptly prepared two servings for our vegan guests and presented it to them hoping to incurr no more of their wrath. Although they were quite pleased with the seed and enjoyed it immensley, when they were finished eating it they thanked me for accomadating them but still insisted that the BBQ was inappropriate.