High fat diet and your gut microbiome

I am not convinced that high fat diet is paleo. On the contrary our ancestors did have gathered and hunt strenuously to find fat.
Jeff Leach has a point in his blog
http://paleobioticslab.com/can-a-high-fat-paleo-diet-cause-obesity-and-diabetes-maybe-unless/
And I totally agree with his paper in the Brit J of Nutrition:
http://journals.cambridge.org/download.php?file=%2FBJN%2FBJN103_11%2FS0007114510000966a.pdf&code=2d62454c1b7280b300828a47df480146
We have a lot to learn about the role of gut flora in low level inflammation which is a key of chronic diseases.