Christ did establish Israel, remember. He was quite involved with things before as well as after His birth as a human.
No, Obama’s statements are not “entirely accurate” whatsoever. Characterizing defense against jihadists in that manner is a sop thrown to Caliphatists, never mind leftists who have perhaps even more blood on their hands.
Did “Christians” perpetrate the Crusades in the name of Christ? Yup.
Did “Christians” defend slavery in the name of Christ? Well, generally not exactly. What they taught, accurately, was that slavery was integral to the Old Testament and accepted as a fact of life in the New Testament. Christ never said a word approving of slavery, so it would be tough to claim He Himself favored it. Sadly, he also never said anything against the institution.
I did not say what Obama said was appropriate, in fact I said it was irrelevant and pretty stupid. Kind of like the comparisons between Communism and McCarthyism. Tens of millions died, possibly over 100 million, as a result of Communism. Perhaps as many as 10,000 people lost their jobs due to McCarthyism, though that number hasn’t been documented well. AFAIK, exactly two Americans were executed for Communist espionage, of which they were quite guilty.
What Obama said about the Crusades and slavery was, however, historically accurate, more or less. If you wish to dispute that, you’ll have to show where what he said was untrue. Which will be a pretty tough row to hoe.