It is sad that these allegations are somehow worse than the eldercide that he committed. They are both wrong but he should have been done a while ago already.
The reason he was not ousted because of his nursing home fiasco is simple, but to explain it, I quote to you the profound words of Ben Hecht in Perfidy.
Guilt does not make a politician outcast—be he Jewish, British, or Nazi. For the politician is never guilty as a wrongdoer; only as a wrong thinker or wrong guesser. Even if his thoughts and guesses set bonfires raging in the world and rain disaster on large areas of it—he is still immune from guilt in the eyes of the law, and in the eyes of his contemporaries. History will sometimes take a look at him, dead in his grave, and give him a bad mark. But the contemporary verdict is nearly always the same—not guilty by virtue of serving an ideal.
The nursing home situation was a bad decision. He can stand tall as a wrong thinker or a wrong guesser. But as a politician he in not immune to personal scandal, which is why he is now in hot political water.