You think Jesus would bake the cake & put his stamp of approval on the false ceremony?  Doubtful!  He would most likely convince the 'couple'  to repent,  pray to God for the strength to at least attempt to live righteously.  Nobody is "afraid of a cake",  but being forced to be a hypocrite by accepting $ in exchange for a symbolic stamp of approval on a ceremony that God considers an abomination is a very scary concer for a devout Christian.  Scripture is very clear about God's view of homosexuality.  
I personally would not want someone making a cake or providing me any services for my wedding if for any reason those service providers had issues with doing so.  
If you are going to force me to cater your wedding against my will,  do you really want to eat the food - lol good luck with that