It's their right.
Some people who believe in reincarnation believe they are.
People have different faiths so they believe in different Gods. If people don't believe in God they are Atheists.
feel comfortable and nice to Muhammad because most people only believe in one god.
They believe in an eternity.
People may feel comfortable sharing their problems with you because they trust you, feel understood by you, and believe that you will offer them support and empathy.
People would find different reasons to inflict suffering on others.
Because people believe different things and have different values.
Different people feel different feelings. So a giant panda may be different to different people!!
At least half of people that believe in ghosts or spirits feel that they may manifest themselves in orbs.
I believe that the English hated the Germany at first
Some people feel that there may have been a Hercules.
No. To believe that there is any "design" is to believe that there is a Creator. To believe that there is a Creator that would "design" people to believe in other gods is counter intuitive.