Why does the U.S.A risk its self by support Isreal ?

You are so misinformed. It appears that you have been reading Palestinian propaganda. You should ask yourself why a people that hate so much are the people you would follow. This reflects on you and not them. Find one people on this planet that hates more than Palestinians then ask yourself if you have the same hate against anyone. If not, these are not your people or ones you should listen to for their opinion of others. God Bless.