Alex, you're conflating 1) 100% agreement on all policy issues with 2) basic agreement on the most important criterion for choosing the party's lead communicator.
Expecting (2) does not require demanding (1). The fact remains that Ruwart explicitly campaigned on being "fully attuned to the Libertarian philosophy", and explicitly said that the ideological future of the party was at stake. That made her anarchist views -- more radical than any POTUS candidate in LP history -- fair game.