A search engine by definition takes an editorial stance on things. They take in all of the internet and decide what to present to users. For a search engine to take no editorial position is to yield the floor to whoever can best game the system, and a propaganda machine like Russia's is absolutely capable of exploiting a search engine that doesn't proactively take measures to avoid being exploited.
That DDG wanted to avoid spreading Russian propaganda that argues against the very existence of the Ukrainian people isn't DDG meddling in politics, it's them steering clear of enabling genocide.