Shooter incident at elementary school in Uvalde, Texas - 19 children and 2 adults dead

I get the sentiment, but in reality what that will lead to is not gun control, but people scared of BLM/Black Panthers to start buying more guns and organizing and so on. Without great leadership, people tend to escalate in the face of threats, not de-escalate.
Those people are buying guns anyway, my plan is to motivate the lawmakers and lobbyist.

On Nov. 22, 1963, President John F. Kennedy was assassinated by Lee Harvey Oswald. He shot the president with an Italian military surplus rifle purchased from a NRA mail-order advertisement. NRA Executive Vice-President Franklin Orth agreed at a congressional hearing that mail-order sales should be banned stating, “We do think that any sane American, who calls himself an American, can object to placing into this bill the instrument which killed the president of the United States.” The NRA also supported California’s Mulford Act of 1967, which had banned carrying loaded weapons in public in response to the Black Panther Party’s impromptu march on the State Capitol to protest gun control legislation on May 2, 1967.
The summer riots of 1967 and assassinations of Martin Luther King Jr. and Robert F. Kennedy in 1968 prompted Congress to reenact a version of the FDR-era gun control laws as the Gun Control Act of 1968. The act updated the law to include minimum age and serial number requirements, and extended the gun ban to include the mentally ill and drug addicts. In addition, it restricted the shipping of guns across state lines to collectors and federally licensed dealers and certain types of bullets could only be purchased with a show of ID. The NRA, however, blocked the most stringent part of the legislation, which mandated a national registry of all guns and a license for all gun carriers. In an interview in American Rifleman, Franklin Orth stated that despite portions of the law appearing “unduly restrictive, the measure as a whole appears to be one that the sportsmen of America can live with.”
https://time.com/4431356/nra-gun-control-history/
Right now there is a bill in congress that mainly addresses background check and there are 51 Senators holding up progress. They need extra motivation.

https://www.congress.gov/bill/117th-congress/house-bill/8