With tensions already high and military maneuvers are beeing held closes to each other ... such a twitter comment for sure would have had an effect.
No one would have pushed any red button because of that, but fighter jets on both sides would have been put on alarm and in the air and close to each other(as well as submarines, warships, tanks on the border..) , with a high chance of clashes. Which could have increased the escalation to the point, that someone would feel forced to put the red button.
It's lucky that those kinds of things never go wron...
"On 26 September 1983, the nuclear early-warning system of the Soviet Union reported the launch of multiple intercontinental ballistic missiles from bases in the United States."
...oh.
https://en.wikipedia.org/wiki/1983_Soviet_nuclear_false_alar...
Military is not _exactly_ ran-out-of-diazepam Dave with his hunting rifle and tinfoil hat.