Why would "kicked by horse" be removed? Maybe you are not interested in knowing all the people who died by being kicked by a horse, but there are those who may want to know this. Being kicked by a horse was a common cause of death, as was also falling off a horse. There was a young x-great uncle in my family who died at eight years because he was kicked by a horse. I would be interested in following up on this topic some day and see who else during what time period was also killed by being kicked by a horse.
Death is an important topic, even if it is not something we like to talk about. I woke up this morning to learn my grand niece was involved in a horrific car accident last night. Her grandmother (my aunt) was supposed to leave today to attend a wedding where she was supposed to be the Maid of Honor. This is real life, and it will change the futures of several close people. Someday, this will be history, and we will see the consequences of these events. In the same way, my ancestors experienced death at the hands of Indians. They watched the tomahawks sinking into their friends and families backs. They returned to see the unborn fetus cut from the mother and impaled on a pike in the yard. They saw the missing scalps. These events led to other events, which became the world we live in, today. Forgetting these events, or hiding them, or preventing them from being categorized, isn't going to change the past, and it is not going to make us feel better. The world is the way it is, and everybody should have the tools for discovering their pasts, even if there are dark events in those pasts.