Lots of speculation about why this dude would namecheck famed pacifist Dietrech Bonhoeffer, but I think the answer is that the West Wing episode We Killed Yamamoto implies Bonhoeffer was the mastermind of Project Valkyrie and Rep. Gill has never read a single book.
Rep. Brandon Gill: "We particularly need the left to tone down the rhetoric ... somebody is gonna listen and believe they are the next Dietrich Bonhoeffer and act on that and that's what we're seeing here."