This article provides an in-depth analysis of the controversy and also goes through each claim made by DCI about the alleged security issues of Iota:
https://medium.com/iota-demystified/iota-vs-dci-or-how-an-innocent-hash-collision-became-a-huge-ego-collision-425114e61e8f
An must-read imo, providing objective discussion amidst all the back and forth of arguments and claims...