Usually, a doubting Thomas, (Biblical)
In general, such persons could be called believers.
Nihilist
A person who believes that war is wrong is called a "pacifist".
Christian??
A person who believes in their dreams can be referred to as a dreamer or an idealist.
A statement that tells what a person thinks or believes is called an opinion, sometimes known as a belief.it is known as a belief
Pacifist
This is called an opinion.
A person who believes in fate embraces the idea that events are predetermined and beyond their control. They may feel that opportunities and experiences are influenced by a higher power or destiny. This belief can provide comfort and guidance in navigating life's uncertainties.
They are called an Anarchist.
Contrapositive
They are called contortionists.