You are right that there are more ways to support. But demanding or asking that somebody else does something is not doing something. A majority of the population consider themselves to be great heroes for making symbolic gestures or for telling their friends over coffee or drinks that "somebody really should do something".
But reality is reality and they have done nothing. They will never do anything voluntarily either – for any cause.
For example to donate to organizations that actively support the war effort or to put pressure on the politicians to do more.