Why did Allah make bad people?
Of course if the world is filled with all good people it will be boring, that doesn't mean you have to do evil. :D
The short answer is that Allah created various kinds of humans with all kinds of shapes, traits, ethnicities and races so that we humans can get to know each other and learn about this vast knowledge of Allah.
Is this the same as why Allah allows Satan to tempt humans or why Allah creates an evil which can certainly destroy human morals? if correct the answer
The evil created by God is not evil, but all the evil that occurs is
the result of their free will.
~ Bediuzzaman Said Nursi
Can you say making knives is a crime (because you can do something evil ...
Why did Allah let Satan to misguide us?
satan requested this permission from Allah & it was granted, means challenge accepted. So satan misguide us as much as possible and we tries to be on the right path.
In short: I think, its main reason is to test us; since we have will, and can don't obey him ...
More study (a google translated text, I hope it is a right translation):
According to the Qur'anic verses, Satan, after being expelled from
God, asked God for respite, and God gave him respite for a certain
period of time, and Satan, after obtaining respite, ...
Science broadens our horizons.
Human Beings should be careful
precautions made not to cross the lines.
Genetic Modifications causes more Harm than
Good & has caused a lot obstacles in the
global world economy today.