The letter emphasized concern over the ongoing humanitarian disaster in Gaza and accused Germany of failing to fulfill its obligation under international law to prevent war crimes.
"The responsibility for having failed to act despite serious warnings is a heavy one," the letter stated.
It urged the German government to take a clear stance against Israel's disproportionate military tactics, which many international law experts consider problematic, and called on independent organizations such as the United Nations (UN) to be allowed to deliver unhindered humanitarian aid to the Palestinian people.
The letter also called for Germany's foreign policy to be shaped more strongly in accordance with international law and human rights principles. It expressed solidarity with all those affected by the situation, especially hostages and their families.
Additionally, the letter referenced public opinion surveys indicating that 80% of the German population criticize Israel's military actions and 60% oppose arms shipments to Israel.
According to the West German Broadcasting Corporation (WDR), which is affiliated with the public broadcaster ARD, the letter was signed by around 50 well-known individuals.