Well, my take was that he knew Stark was going to die, and he hoped he would be venerated by people afterward. It's not really a big deal. As I said, your idea is interesting; I just don't see it from what was said and from what happened to the people who didn't die. I could be wrong, obviously. I also don't think it fits with what Thanos said he was doing. He was simply killing off half the universe, thus "alleviating the strain on the resources" the universe has.