How do you make sure bing ads don't appear on your hubs and only Kontera ads do?

You can't do anything to afffect the bing ads. Remember that you share ad impressions with hubpages. You get 60% and hubpages gets 40%.

They can show which ads they like in their portion.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.