We Sikhs don't believe that followers of other religions are doomed . Our scriptures don't teach us to hate people of other religions .
Sikh scripture says best religion is reciting name of god , which you can do by any religion .
You can read more about Sikh philosophy here and decide for yourself :
http://www.sikhs.org/philos.htm
The TRUE religion is the one which treats man and woman fairly. The true religion believes that live and let live and dint kill others because they are of another faith. Sikhism treats both genders fairly because we believe, how is a woman weak if she gives birth to kings. Islam tells to kill all non-believers. Sikhism is better for both genders and you dint get Sikhs wearing chivvy Adidas with a NY cap with a sticker still on. Type in Pipal Tree Sikhism and read the Pipal Tree story.
i a totally agree with Karam sing , but want to add one more thing that Sikhism means learning the good things of the world. the more u learn the more u grow. Also Sikhism's main aim is to improve Ur self. con troll Ur mind.