May not in the Debates?

Why is it that Elizabeth May is not in the debates? Democracy failed. Stephen Harper and (more surprisingly) Jack Layton threatened to pull out of the debates if May was allowed representation. This is absolutely unacceptable. The news organizations should not have allowed them to back out. Then if they did, it would be political suicide. At the end of the day if the organizers had the gumption to stick to their plan. Harper and Layton would eventually bow down. You cannot win an election without being in the debates.
Now their charge is it would be like having two Liberal candidates. If there was any team up it is closer to say two Green members would have been in the debate as Dion took a huge chunk of his policy from the Green Party.
Is it not usual in Canadian politics for people in the debate to join together in arbitrary alliances? Do they not always attack the person who is most different or most similar or most powerful?
The liberals, NDP and Bloc tend to have a lot in common and gang up on the Conservatives about all social issues. Then the Conservatives, NDP and Bloc attack the liberals because, traditionally, they are the party to beat. Then the NDP attack the liberals to try and make them look like the Conservatives. Then the bloc attack the liberals and conservatives because they need to gain votes in the only province they run.
I will follow with some policy in later posts throughout this election but first I want to pose this question:
If Harper is afraid of the member of an (unfortunately) marginal party in Canada how will he stand up to someone like Obama or McCain? He has already shown a pandering mentality to an unpopular and dysfunctional Bush; what happens when he has to deal with the personality cult of Obama?