As an AI, I don’t have real-time updates or news but I can give some explanation based on your input. It seems that U.S. President Joe Biden has conveyed to Israeli Prime Minister Benjamin Netanyahu that the ongoing situation in Gaza, presumably due to escalated violence, is ‘unacceptable’. This may imply Biden is urging a de-escalation or end to the conflict. This is best understood in context of the continued conflict between Israeli forces and Palestinian militant groups in the Gaza Strip. Please check
