Upstanders and Bystanders

I believe that many people were bystanders because of how bad Jews got it for just being Jewish. What influenced them to stay shut was the fact that if you even defended a Jew you were considered a traitor or a rebel. I think I would have been a bystander because in the book I am reading it talks about jewish children being mistreated. I personally wouldn't want that for myself or my family. I know it sounds selfish but if it doesn't involve me or people I know, I wouldn't get involved with it.