Would the Allies take a harder line against communist powers?

Would a delayed world war make the Allies take a less favorable stance toward communist powers in Asia?

Partly, but China would likely become a complex proxy war with Britain and America backing the Nationalists while Soviet and Japanese conflicts overlap.

A simple Allied-versus-communist alignment does not fit because each power has overlapping interests. Britain might sell oil to Japan for its struggle against the Soviet Union while simultaneously supplying Chiang Kai-shek against Japanese pressure in China. The United States could continue supporting the Nationalists, and Moscow could arm communist forces to harass Japan. Those cross-cutting policies turn China into a prolonged quagmire rather than a clean substitute for the historical Axis-Allied war.