And exhibited none of the characteristics of destruction by fire, i.e. ...
3. Evidence of fire temperatures capable of softening steel

Kenny stated:
"I've already shown you testimony from a steel inspector who told of the softening and twisting of the steel."

The fact that an inspector found softening and twisting of the steel only means that -something- softened and twisted it (explosives could certainly manage it), not that there was any evidence that the jet fuel or office fires did it.

Kenny stated:

"And the lack of concrete in the buildings core and outer columns made the towers were more vulnerable to fire."

You may want to read this:
The Core Structure Of The World Trade Center Towers Was A Steel Reinforced, Cast Concrete, Tubular Core.