Cheating on his wife was reprehensible, but not really impeachment-worthy. Did it make any difference in his ability to govern? Nope. But sure, if it didn’t happen in his second term, I’m not going to say you shouldn’t have been allowed to consider it for whether or not you should vote for his reelection.
It’s not, but do you think we’re giving away cutting edge military tech or not developing that cutting edge tech that obsoletes the stuff we’re giving away regardless? It doesn’t really have a lot of value to the US rotting away in warehouse storage.
Note that I’m not saying this in support of Israel nor am I well enough informed to know if this even applies there. It definitely applies to Ukraine aid, though.