Should Confidence in a Belief Be Informed by How Long the Belief Has Been Held?

Questions about whether confidence in a belief should be informed by how long the belief has been held or by how many have held it, and whether it’s irrational and illogical to believe in God and one has to go against reason to believe in him.  

• Should confidence in a belief be informed by how long the belief has been held or by how many have held it?
• Is it irrational and illogical to believe in God, and does one have to go against reason to believe in him?