The sale of the S-400 air-defense system to Turkey risks nullifying the stealth and cutting-edge advantages of fifth-generation fighters like the F-35 and F-22
The F-35 may have some good electronics but is not a good plane to fly against any competent competitor. The Marine version which can take off and land vertically, is a remake of the Soviet Yakovlev 141 which first flew in 1989 (vid).
Israel boasts a broad repertoire of standoff weapons, along with highly advanced electronic warfare systems and enhanced cyber capabilities. Nevertheless, the S-300 in Syria is a deterrent to be reckoned with.
Any sort of attack on North Korea would be a gamble with the lives of thousands if not millions of South Korean and Japanese lives. As such, a diplomatic solution is far more preferable to a war than might end poorly.