Found here. Short version: um, just as a reminder, Republicans like George W Bush*. Even if they have lots of problems with his domestic policies. So it shouldn’t be a surprise when a comment about him keeping us safe after 9/11 gets applauded at a Republican debate.
That being said, they shifted the title around a little.
*For that matter, most people who aren’t Democrats like GWB these days, which is why he’s got a favorable approval rating again.