For people on the ground, Russian peacekeepers are like the only remaining shield between them and physical extinction. Even if they're not trusted, they are the only guarantee—minimal guarantee.
As for the European Union, no, the European Union doesn't trust the Russian peacekeepers. The European Parliament was very clear in their resolution yesterday. They even called for a replacement of Russian peacekeepers by OSCE peacekeepers.
Those are quite distinct sensibilities on the issue. Obviously, the impact on your immediate physical existence is not the same when you talk about one perspective or the other.