If I were a doctor and someone came to me and asked me to kill them and I said I couldn't but I knew someone who could and referred them to him, do you seriously think that I would not be complicit in the death of that person? 
It is the same as if one of your children asked me to supply him/her with cocaine and I said I couldn't but put him/her in touch with a dealer. Would you not hold me responsible for your child taking class A drugs?
Yes, there was a case in Sweden and a similar one in Scotland. Also a Catholic care home in Belgium was taken to court and fined for not allowing a resident to be euthanised on its premises. Now fining may not be as wicked as ISIS cutting off heads but nevertheless it is persecution.