I'm seeing a false teaching that is spreading willy-nilly across social media...that the God of the Old Testament is not the same God of the New Testament.
Not only in Atzmon's video. Here's an example from the comments under his video on YouTube:
@two-strokesmoke7289 5 hours ago
The "god" of the old testament is not the MOST HIGH TRUE GOD, however; he (god in OT is a warmonger and he is a liar and a murderer)
@two-strokesmoke is a liar and an idiot. And he is not alone.
For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears; And they shall turn away their ears from the truth, and shall be turned unto fables. 2 Timothy 4:3-4
Here is the foundational Christian teaching: the God of the Bible is the same God, of both the Old and New Testaments. The same yesterday, today, forever.