Historically, more often than not, when a narcissistic megalomaniac is victim of a close call of targeted violence against them, rather than them becoming more empathetic with the sadly large swathe of humanity that also often faces targeted violence, they just double down on their own paranoia.
Except within the USA, declining population growth could be reversed immediately simply by returning to our pre-1924 immigration laws (i.e. the Ellis Island era) that between 1890 - 1924 allowed the USA to have some of the largest economic growth it ever has done. Yet “conservatives” (better termed “regressives” or “reactionaries”) these days want to do the exact opposite, out of xenophobia.