Ok I guess Ill step up and honestly answer the question
"To those on these forums who are Christian AND OR to those who believe in the God of the Old Testament; how does one overcome many of the questionable actions God took or allowed to happen in the Old Testament?"
At its core, this is a moral objection to the actions of God.
I understand the heart of your question, but before I answer, It might help to understand the doctrine of God.
1- God is the only eternal uncreated being in the universe
2- Ergo, God is the only one who has a divine right to dictate law [be that moral or otherwise]
3- Therefore, our understanding of God is that he has absolute right to determine what OUGHT to be in the realms of ethics. What God says/does is good
What are the implications of this? It means that God does not conform to an external standard of righteousness [good] God is the very definition of Good. The only way we [as people] can measure right and wrong is by an absolute measuring rod, which is God.
Your question assumes that there is a standard of right and wrong found outside of God, and using that standard [whatever it is] you have judged God as not conforming to that standard, which is why you ask the question: how does one overcome many of the questionable actions God took or allowed to happen in the Old Testament?"
I don't have to overcome anything. My mind is finite and limited in perspective, I do not know the complete circumstances surrounding any given judgment by God, but does it really matter anyways?
What right do I have to breathe if God is the one who created me in the first place? What right do we have to anything since everything we have and are is owed to God in the first place? Instead we see that God is merciful by giving us life...he is also perfectly Just in the execution of his judgments [of which he is the standard]
As for the question of Jesus being different then the God of the OT, this can easily be reconciled: Jesus came to bear witness of the Truth [Jn 18:37] To set the captives free [Luke 4:18] He came as a ministry of reconciliation [2 Cor 5:11] Jesus was prophesied to come on a donkey [in peace]...However this does not mean Jesus will not execute Justice. I appeal to the Book of Revelation for this one.
Jesus second coming is a judgment against the wicked [Matt 13:41;2 Peter 2:9; Rev 19:11-16]
This is what it all boils down to. If there is a moral objection against God, what moral LAW are you appealing to in order to make that judgement?