Trent Lott called to task by SBC leaders?

No. Actually, I read the quotes that caused so much consternation. I will dig them up if you like.

It is what none of us actually read but rather assumed that led to Lott's demise... actually, it was his own lack of a backbone.

This is simply a case of you reading between the lines. Granted, Lott acted like a guilty man but Thurmond stood for alot more than segregation. While you may argue that this was his distinctive trademark, you have no right to assume that Lott was referring to segregation.