Who is more to blame for the loss of innocent life: the germans who sank a ship carrying war materials during a war, or the americans and british who his war materials on a passenger ship full of civilians? why?

I'm guessing that this is an opinion question.

One way to look at it is that the British and Americans are to blame because they hid war materials in a passenger ship making their lives more at risk. The Germans definently shouldn't have sunk a ship with innocent passengers in it but they did also warn the Americans about their safety being at risk at sea.

Another could argue that the British didn't know that a passenger ship would ever get attacked so they probably thought that it would be safe (safer than it really is, at least). The Germans, on the other hand, did know that innocent lives were put at risk.

send them to therapy or somthing like that

yes, since there is a positive and a negetive if the positive and negitive wasn't there wouldn't a flow electricity in it.