South Korea's distancing itself from the US rhetoric on North Korea makes a US strike more likely

It has been said that the US does not have a military option against North Korea. North Korea's ability to destroy Seoul if they are struck by the US makes a US strike on the North politically unthinkable, according to many.
However, if South Korea had a public split with the US, and could convince the North that they were totally against any US attack, then perhaps the North would not retaliate against Seoul if such an attack did come.
Somewhat ironically, if the South withdrew from its alliance with the US, over the current crisis then that could give the US more room to act.
And by the way
If the South distanced itself from the US it would also make China happier with the idea of a strike. China certainly doesn't want a full blown war on the Korean peninsula, and so it would oppose a strike if it thought that ran the risk of restarting the Korean War. If, however, there was to be a strike and no war, China could be quite happy about the North having its nuclear and ballistic weaponry removed.
This is just a by the way thought, though, because the US does not need any approval from China to decide whether it bombs North Korea or not.