Ending of Angels in America

I find the ending to the play to be very interesting. I have also be watching the tv series and it follows the book but seems to just give you more of the visual effect of what is really happening. I find it interesting how everyone is able to forgive each other but no on forgives Joe for what he did. Louis forgave Prior, and Ethel forgave Roy.  It is like why couldn't Harper forgive Joe? He was final honest with her, and what he did wasn't nearly as bad as what Roy has done his entire life. In the TV version you see Harper give Joe one of her pills. I think maybe Joe finally went off the deep end after realizing he could never find love.