If God is all powerful and yet merciful, why would he send the majority of the human race to eternal damnation?? Christian or not, every human is still His creations and He cares about each individual.
Is it justifiable to put someone directly in hell after they die, solely because they were not Christian when they were alive?
(Even the Pope has agreed that eternal damnation would be an unfair and unjust punishment for not believing even if they're a great person. )
People who (in my opinion) deserve to go to heaven because of their impact on the world- despite not being Christian: (no particular order)
Medical Heroes:
Jonas Salk (found polio vaccine),
Rosiland Franklin (discovering the structures of DNA),
Avicenna (aka "Father of Early Modern Medicine"),
Alfred Adler (revolutionary in his discoveries and studies of mental health and psychology),
Marie Curie (radiation and x-rays),
Selfless heroes:
Dave Sanders (coach at Columbine who died saving over 100 students at least),
MANY firemen on 9/11,
Geertruida Wijsmuller-Meijer (helped save over 10,000 Jewish children during the Holocaust)
Revolutionary scientific minds:
Stephen Hawking, Albert Einstein
THERE ARE MILLIONS MORE!! (Feel free to list more that you think of)