NASA is exchanging seats; SpaceX's next crew launch, Crew-5, will carry Russian cosmonaut Anna Kikina. Russia dragged their feet on doing seat swaps like this, they're not happy the US is not directly subsidizing their space program the way it was between the end of the shuttle program and the start of SpaceX crew launches. Doing a seat swap means showing that they trust the life of one of their cosmonauts on an American rocket and an American launch vehicle again, which hasn't happened for a long time. After SpaceX's previous successful manned flights both for NASA and private entities Russia can't credibly claim that the Dragon capsule is unreasonably dangerous to fly on.

The whole point of ISS politically from the beginning was to be neutral ground for countries to work together in spite of whatever fights they might be having back on earth. The idea was one of interdependence and cooperation to foster a peaceful future. I don't think that philosophy has proven effective, but that was the idea anyway.