There is so much speculation being repeated as fact. Many of the conclusions that have been drawn are likely scenarios, but are not by any means certain.
There is no direct evidence that the "captain" was locked out or that the key code was used twice.
There is no direct evidence that it was the captain that was trying to enter the cockpit, or if he was alone, or under duress.
The ES data may have been spoofed; it comes from an unofficial source.
No doubt the official statements strongly suggest that the F/O brought down the aircraft, but there are some loose ends that need to be tied up before this conclusion can be relied on.