the foundation of personal spirituality is supported in every organized religion.
all of them do agree on one thing, that your relationship with your lord (called by any name you choose) is a personal one. your path to him/her lay solely and completely within your own hands and heart.
so with all the clap trappings and brouhaha set aside, your personal spirituality is what gains you or denies you entrance into what ever heaven your lord promises, in ALL religions.
why then is it unfathomable to believe that you need no organized religion to reach heaven, but instead just an honest individually spiritual connection with him/her?