We had no such problems before we had what were sold as "better gun laws". It's onlt ignorance and paranoia behind the support for any gun laws. As much of the world demonstrates, gun control doesn't work. The only places where it appears to work are cultures that didn't have problems with guns or violence before they had any gun control laws.
Americans have ALWAYS had gun problems.
List of massacres in the United States - Wikipedia
https://en.wikipedia.org/wiki/List_of_massacres_in_the_United_States
This is a partial list of massacres in the United States; it excludes single perpetrator massacres; death tolls may be approximate. For single-perpetrator events and shooting sprees, see Lists of rampage .... Bloody Dawn: The Story of the Lawrence Massacre. Kent State University Press 12 December 1992.
