I read it many times, and I thought it a simple warning not to be a traitor!
Those people were subjects of the king; when he was not present, they plotted against him, simple treason.
When he came back, he did not tolerate their treason.
Do we have a parallel here?
Trump, a businessman and non-politician decided to run for president. Many of his fellow Republicans despised him because of his success and called themselves “Never-Trumpers". They said we do not want Trump to be our President and we will help Hillary to be elected. But when Trump won the presidency, he said, “Now as for these enemies of mine who did not want me to be president, bring them here so that they may be interviewed for jobs within my administration. And the great Pence shall weigh their qualifications and motivations and if he finds that they are not suitable, he shall slay their political careers before me.