At what? Volleyball? Tiddlywinks? Offence? Defense? I would rate them number one or two at defense. The US obviously couldn't stop a significant attack on our soil. I would rate the US number 3 or 4 at homeland defense. You need to compare apples to apples.
Israel is not an offensive (expeditionary) force, as is the US.
Force ratios between the IDF and PLA? LOL! (Israel has nukes. That would be a force multiplier, even if never used.) In what context? Your question indicates your lack of understanding.
/john