According to the log, X is never dying.
Are you sure this is the log file from right after you get that message from init about respawning too fast?
Note that that log file gets overwritten every time X starts up, so if you're changing some configuration in order to get a GUI to post here, you're going to have to save the old log file, and not post the current one.
And don't paste it into your post. That's what the "attach file" section on the reply page is for -- attach it as a file instead, so that people that don't want (or don't need) to read it don't have to. You will have to rename it to end in .txt, but that shouldn't be too hard for you to accomplish...