By Jamie Roberts Shannen Doherty has hit out at conspiracy theorists who plagued Princess Kate prior to her cancer diagnosis. The Charmed star, 52, admitted she “admires” the Princess of Wales for releasing the statement. It comes as the actress continues to share updates on her own cancer battle. Despite being full of praise for Kate, Shannen slammed those who shared wild ideas about Kate’s whereabouts as she tried to deal with her diagnosis in private. The former Beverly Hills, 90210 star took to Instagram to share her dismay. For all the latest on news, politics, sports, and showbiz from th…