With all due respect, that is not an answer, that is a pre-supposition. The OP already pre-supposes God.
Then the question should entail why has god let mankind suffer for over 2000 years when he sent his only begotten son to cure and rid humanity of its troubles and perils ?
Could it possibly be that this son of god Jesus Christ was a man made fictionalized story albeit a heart felt appealing one ?
Since Jesus himself said when speaking to his then followers that many of you will not experience death.
So all these things were to occur at the time of him speaking.
As far as we know none these things occured, all of his followers died.
Is lying a righteous virtue ?