Only 4,000 people came to the most important demonstration held ahead of the G7 summit on Saturday, far fewer than expected, Munich police spokesperson Andreas Franken said two hours after the event began. Ahead of the demonstration, billed as a large-scale protest, Bavarian police said they expected at least 20,000 participants, possibly far more if the weather was good. More may yet turn out, as often people join demonstrations in the course of the day, police said. However, some activists were dismayed at the low turnout. “We are disappointed,” said 46-year-old Andrea, a Greenpeace activist…