Some theology courses would go a long way in helping you understand these criticisms contextually.
1) Jehovah telling Abraham to murder his son. My reply; kill me now, I won't do it.
Murder is the shedding of innocent blood. What God was doing was asking him to sacrifice his son. A number of rabbinical documentaries, as well as Christian sources, indicate that Abraham knew the Lord's request was a test. But he needed faith to go through with it. The Jews think it was only a test and nothing more, while Christians understand God asking Abraham to sacrifice his only son was an object lesson pointing to God's sacrifice of His own Son.
2) The bear killing I think 21 wise ass children. Geeze, they were just children.
Actually, they weren't children and the bear didn't necessarily kill them, but "tore" them. As one scholar writes: Elisha "was set upon by a mob of mature youths (erroneously called 'little children ' in our version) who seem to have heard of Elijah's [ascension] and therefore taunted Elisha saying, 'Go up, thou bald head; go up, thou bald head.' Dr. Adam Clarke says the significance of this cry might be caught in the words, 'Ascend, thou empty skull, to heaven, as it is pretended thy master [Elijah] did.'" He adds: " The words, 'bald head' were often used in the old Hebrew vocabulary to imply leprosy since the disease often caused baldness. It was a term of hatred or derision." Regarding the "children," the citation reads: " The word naar...is used to describe Solomon at his accession, when he was at least twenty years old. (Geikie, Hours With the Bible, 4:127) Dr. Clarke says the word includes "a young man, a servant, or even a soldier, or one fit to go out to battle: and is so translated in a multitude of places in our common English version.' He mentions many examples. See Clarke, Bible Commentary, 2:486." The scripture also states that Elisha cursed them in the name of the Lord, indicating that it was God, who knows the thoughts of all men, was the one aggrieved, not the prophet.
3) The murderer and adulterer David got to live but his family paid. Wonder what Uziah will have to say to David in the resurection.
It's entirely possible that they've already spoken. People who die in consequence of the actions of others simply pass to another form of existence. Death isn't viewed by God in the same context that we view it. You see it as a punishment. God sees it as the return of a spirit to the spirit world and nothing more. You might be surprised to learn that many view returning to the beauty of the realm of the spirits is a blessing. Only in this world is death viewed as a punishment. In some cases, when the Lord orders the destruction of the wicked, it is a punishment because in some cases the punished find themselves in Hell, which is a temporary prison. David, when he departed this life, suffered in Hell and in his psalms he asked that the Lord not leave his spirit in Hell. Many view Hell as vindictive; I believe it is remedial. God doesn't involve himself in things with no purpose, neither is He unjust that He would leave someone (regardless of his crimes) in a burning Hell forever. Some have gone so far as to suggest that in Hell, men are their own tormentors. This is a view held by many of the early Christians.
4) Jehovah is humble and we have free will. But he'll murder you if you don't worship him.
God commands all men, and as our Father He has the prerogative of guiding and directing us. Even so, he gives men free agency to either accept Him or reject Him. Before man came to this earth, he was known to God and God was known to us. (Jeremiah 1:5) Again, death is subjective, and when the Lord orders anyone's destruction He does it for a good reason. But those who don't worship Him aren't "murdered." Often they live to ripe old ages and then die, where they are judged and taught. (1 Peter 3:18-19) In the end, every knee shall bend and every tongue confess Christ. (Philippians 2:10)
5) An old blood arguement that a transfusion=eating blood. Even as a dumb kid I thought that was stupid and wrong reasoning. We don't digest and matabolize our blood.