As was posted above the United States has been twisting Israel’s arm to force it to give aid and support to the Hamas terrorist organization. Perhaps the most egregious example is the requirement that Israel supply concrete to Hamas. I have no doubt that both the US and Israel knew that it was being used to build the tunnels, since they both could see what above-ground infrastructure projects were being completed.
Code Pink and Bernadine Dohrn among others have gone to Gaza and met with Hamas during the Obama regime.
Finally a consensus seems to be emerging in Israel that this may be an opportune time to obliterate Hamas, now that the Obama regime is weakened and Egypt and Saudi Arabia are giving their tacit approval.
The USA doesn’t give money or arms to Hamas, but the USA does give humanitarian aid to the People there in Gaza through agencies, such as UNRWA who administers the programs.
And Israel, who controls the good that go into Gaza (they have a blockade around Gaza) does let the goods that the USA sends in through UNRWA go through their checkpoints, as Israel has no problem with that.
What Israel doesn’t let go through their checkpoints or past their blockade are arms and war material going to Hamas.