sweet cakes by melissa in oregon found to have discriminated against lesbian couple by refusing them wedding cake in january 2013 .
melissa and aaron klein ordered to pay fine that they say will ` ruin ' them .
rachel bowman-cryer and her wife laurel said to have suffered emotional distress from case , which prompted death threats .
fine of $ 135,000 may be increased or decreased by state labor head .
fundraising page for bakery raised $ 100,000 before it was shut it down .
bakers said ` satan 's really at work ' and urged donations on christian site .