Culture Du Diligence - What Does Bank and Bankby Do?

Some culture clash is probably inevitable any time one bank buys another. But what if acquiring bank a gets in there and discovers that acquired bank b has a significantly different culture from their own? Well, hopefully a culture due diligence can provide that as an early warning sign id wouldn't it be great if culture compatibility and kind of integration potento ofa critical determinance of strategic fen  of the kind of a go no go for acquisitions.