If God exists, then He is merciful, kind, just, all knowing, all powerful.
Counting myself as a believer in God, and in the scriptures, I never even ask myself these questions. And certainly God doesn’t need to justify His actions
So, you are able to determine that god is "kind" and "just" by use of your own faculties, yet when it comes to looking at god's actions critically suddenly those same faculties are not enough to call a spade a spade when god acts unjustly?
If your reasoning is not sufficient enough to condemn god's actions as unjust, how is that same reasoning able to praise god ? If it's too flawed to judge him, then it's too flawed to praise him too.
And don’t buy into that JW nonsense
Mormon nonsense is better?