Because you're trying to start a world war but you're vastly overestimating your own power.
They are heavily banking on Germany remaining loyal to the US. Which is not a bad bet given Germanys hatred of Muslims and blind loyalty towards Israel. They will condemn some US actions but their capitalist interests are completely aligned.
Turkeys Leadership (not it's people) are very loyal to the US and short of a coup that will not change.
Those are the two (see edit) largest military powers in NATO (excluding the US). They are banking on Europe following Germany and Turkeys alignments. They do not give a shit about anyone else, and honestly, they don't really have to if Russia aligned with the US.
The play with Russia is to attempt to distance them from China but I do not think Putin is as dumb as Trump. I think Putin is playing Trump pretty well (well from Russias point of view obviously).
But I think they vastly underestimate how important soft power is and how much of the global south matters in a world war 3 in comparison to WW2. China absolutely looks better to all of the global South countries.
If I had to guess. We'll see uprisings against US military bases throughout the global south moving forward. Supported by Russia with arms. I think China will remain out of it as long as they can. Supporting only east Asian countries to solidify alignments near their territories.
Edit: Germany is the 5th largest military actually but their economic influence over the EU makes them extremely important. Also, Poland (3rd largest) is another similar ally of the US with a lot of right wing reactionary movements happening similar to Germany. You can basically assume both will align with the US.