[edwin hubble]

"But he attempts to order someone who he thinks is not Catholic to stop saying he is Catholic."

Actually you are mistaken here. Of course the church, or any private group, has the power to define the terms of membership and the conditions under which any individual is a member or not.

Daschle does not decide if he is a member. The private association decides his membership.

Suppose I claimed to be a member of a certain private association and showed open contempt for its beliefs.

[Torie]

Suppose I claimed to be a member of a certain private association and showed open contempt for its beliefs

Just say I am a fraud, and a disruptor, and should be banned. But don't purport to order me around. Just punish me within your jurisdiction, and within the secular law.