Just more bluster from Russia. This won’t happen. Not only would the cosmonauts NOT abandon their fellow explorer (very elite club), the entire World would turn their back on Russia if it occurred.
That bluster is a strange immature mind set that I don’t understand. Most mature and rational people don’t resort to things on par with an 8 year-old school yard bully.
The American should refuse to ride on Russian crap. Elon is sending 4 tourists yes tourists to the international space station at the end of the month on his 100% private spaceship. That spaceship holds 7 so the American can and more importantly should come home in an American rocket. No American should ever set foot in a Russian rocket again for any reason. Musk already did the math and said his Crew Dragon ship can take over the population duties from Soyuz to keep the ISS in its proper orbital slot. At the tempo SpaceX is making second stages they could keep the ISS up indefinitely up. They have the only reusable rocket on earth with some boosters crossing ten uses its science fiction from just ten years ago. NASA only in their wetdreams could hope to match not only SpaceX tempo but cost per kg to orbit. SpaceX will launch 2/3 of ALL the mass humans put into orbit this year read that again. Once starship flys which it’s ready but the FAA is holding it’s flight permits then 90% of ALL the mass put into orbit per year will be on Musk rockets he is the Edison of our century.