The search results provided do not contain any information about Rudy Giuliani’s specific comments regarding someone named “Mamdani” being “extraordinarily dangerous” or that this person “would’ve been ignored 20 years ago.” The available search results only discuss Giuliani’s general criticism of Democrats for supporting criminals over police and his concerns about threats against Donald Trump.
Without specific details about who Mamdani is, what context Giuliani made these comments in, or what prompted his remarks, I cannot write an accurate news article about this story. The information needed to craft the requested 8-paragraph conservative news article is not available in the provided search results.