Thanks guys, now it works! I used rawtherapee to edit the image and then I saved it as a 16bit tiff and it works when I open it in the gimp!!! So it looks like it is a bug in nufraw cause it looks messed up in other programs to that I open the tiff created by nufraw. 
edit: Maybe I did something wrong or it was just a fluke a one time thing or I didn't do it again what caused the bug in the first place cause I tried it again and the image looks fine loaded in gimp as 16bit.
In your guys opinion which is the best Raw photo editor that is open source and available for Linux?
Can you send 16bit images to Walmart for printing or do you need to go to a specialty store?
Also, can you have them use the embedded color profile that you used to calibrate your monitor with their printer?
Walmart or is this specialty store only also?
Can you print 16bit images at home with a consumer based printer?
Such as one of these?
https://www.thinkpenguin.com/catalog/printer-all-onee-gnulinux
Do you guys recommend this for color calibration? Going to use displaycal.
http://www.hughski.com/colorhug2.html
edit: Maybe I did something wrong or it was just a fluke a one time thing or I didn't do it again what caused the bug in the first place cause I tried it again and the image looks fine loaded in gimp as 16bit.
In your guys opinion which is the best Raw photo editor that is open source and available for Linux?
Can you send 16bit images to Walmart for printing or do you need to go to a specialty store?
Also, can you have them use the embedded color profile that you used to calibrate your monitor with their printer?
Walmart or is this specialty store only also?
Can you print 16bit images at home with a consumer based printer?
Such as one of these?
https://www.thinkpenguin.com/catalog/printer-all-onee-gnulinux
Do you guys recommend this for color calibration? Going to use displaycal.
http://www.hughski.com/colorhug2.html