I'm seeing this image passed around a lot.

I have a gut-feeling that the information provided this way is somehow incomplete or even erroneous, but I'm not well versed enough in statistics to respond. It makes me think of this xkcd comic, that even with solid historical data, certain situations can change how things can be predicted.

Is this chart as presented useful for accurately showing what the threat level from refugees is? Is there necessary statistical context that makes this chart more or less useful?

Note: Try to keep it in layman's terms :)