The comments responding to you are pretty unnecessarily hostile, but I personally get where you're coming from. I personally think it's best to watch the thing so that you can be best informed, even if it's hard to do. Not even because of veganism being ethical, but because the fear of the unknown is a lot scarier than any documentary could be, IMO. Information is power, and having information (even distressing information) is empowerment.

Also, I loved meat too, but when I went vegan, I never really missed it. I was pretty worried about missing certain foods (one was sushi), but that never really happened to me.