The nice thing about living in the US: we can all have different political opinion, express them ore or less freely, and four to six years do something concrete to change the situation. Unhappy with what is happening? Write your Representatives and Senators; organize others to do so. Circulate petitions, organize letter writing, meeting, etc. Campaign for those who share your views. Talk/wite to those who don't, to see if you can share your views, perhaps change theirs.
Those who set our foreign policy and enter us into wars are ELECTED by us. ANd they want to keep getting elected. If enough of their consituency makes it clear they will not vote for them due to an issue, most politicians will find a way to give the people what they want.