I agree that KLMs object in operating the route will be to feed their network ex AMS both Longhaul and short haul e.However , I would suggest that will also need point to point traffic to achieve reasonable loads ,even is this is low yielding and will compete hard with U2 for the Pt 2 Pt traffic.
Also, so far as I am aware Dub/Ams is not operated by KLM ,Rather ,they leave it to Aer Lingus to feed their Ams hub.
As EI do not currently offer Business class ,BHD will be the only airport on the island of Ireland to offer KLM service and the only service offering a business class product .Someone correct me if I'm wrong !