I have to say that I don't think these questions have any standing in this argument really. Basically someone who was trying to protect their practices could always proclaim the above questions to silent away the critics without first exploring what is being said.
However if I wanted to answer these questions I would simply say.
1. Yes they should, and I would GIR the example that if this same private clubs had a by law that blacks are not allowed to eat lunch between 11-2 there needs to be a mechanism to put this practice to an end. Now I know this isn't the case but since you made a general statement I gave you an example where I would answer with a yes.. Back to our example, there is no one claiming to want to go and change any private clubs golf playing time rules, but we have the right to discuss and express our opinions in regards to the subject! Also to claim that it is the will of the members is very strange as it is possible that 95% of members could be white for example so you can't say that it is the will of the blacks to not be allowed to eat from 11-2.
2. Yes, they should.. These members might be afraid to express their own opinions in fear of back lash from the country club and termination of membership. It might be the most prestigious club in town so they want to be members here and they can't afford to complain.. I can think of many other reasons why the people who are being discriminated against do not complain.. Heck it happens at work all the time because the person doesn't want to lose their job and be seen as shaking the boat!