Israel is going to need to be a lot more internationally vocal if they disapprove of Bibi. I know the majority of american folks of jewish descent disapprove of Bibi's actions but his polling in Israel is a lot less unfavorable.
There have been many enormous protests against him in Israel, where a large part of the country regards him as corrupt and ineffectual (though not everyone agrees on why, eg left and right would like him to be less and more militaristic). But these protests get little coverage in US news media. Mind you I don't think this is peculiar to Israel, foreign affairs coverage in the US is just generally dreadful, partly because many Americans just do not care about the rest of the world.
Did you notice that you are replying to a top-level post which accuses the twice elected president of the USA of acting against American interests?
"Having a democratic mandate" is either a valid counterargument or it is not. But it is simply not consistent to apply it only to Netanyahu and not to Trump.
Most Israelis are fully aligned on what Bibi has been doing. Sure, they like to say that they hate him to maintain decency, but when it comes to his actual policies on Palestinians, 90% of Israelis are fully on board.