I understand why you'd think this is distasteful, but everyone in the film participated voluntarily and there were no reenactments. The people in the film may just want to tell their stories, and those watching it are likely to better understand the timeline of the events. It's really no different than a news article with video - it's just longer.

It's important to remember this event so we don't forget that violent antisemitism is a modern issue as well. Other hate-motivated shootings such as Buffalo are further evidence that white nationalism requires monitoring.

I think there is some value in remembering the people who were killed, as well.

Edit: Also, you refer to the documentary as being related to "Hollywood" in another comment. There are no actors in it. It's just long-form video journalism.