The Original Gangster

Two questions.

First: Why is it only know as the St. Valentine's Day Massacre, not just the Valentine's Day Massacre. I guess we weren't so secular in 1926 and it stuck.

Second: Was the St. Valentine's Day Massacre in effect to Al Capone, what 9/11 was to Osama Bin Laden? The overkill watershed event that turned public opinion sour and allowed the feds to take drastic measures to disrupt the organization behind the madness.