They don't even know that the state was declared in 1988 and don't care about how stupid they look to the rest of the world. On the brighter side, they are the best that corrupt money can buy. And most will stay bought. Lastly, no resolution of this kind is binding on anybody and even some who voted for it know that.
Report: Car bomb kills 10 in Syrian port city (AP)
from the article: U.S. House opposes unilateral declaration of Palestinian state