Iron Dome was an Israeli initiated, Israeli funded project. The US is, however, funding the procurement of four additional batteries for a very good reason: The US believes that if Israel feels more secure, it will be less likely to initiate a major operation against Gaza. That restraint is what they're paying for. As to the suggestion that Israel should "make peace" or "end the occupation", Hamas has made clear they will *never* agree to peace with Israel because they consider the entire country to be "occupied" territory. They also call - in their Charter - to kill the Jews. One can't make peace with such people.
Jordan foreign minister says to speak with Kerry on Israel-Palestinian conflict (Reuters)
from the article: Iron Dome is not enough to protect Israeli citizens