However, it depends on your locality a LOT
There is currently a LOT of cyberwarfare going on
If you are in Russia, it is okay to fuck with United States government websites
If you are in the United States, it is okay to fuck with Russian government websites
With Israel, I'm not so certain, but I think that the United States and Israel are allies, and personally, just to be on the safe side, I wouldn't fuck with Israel too much because Israel is strong as fuck like if you wanna imagine Israel she takes her hands and she chokes the fuck out of you for real