Trump needs to call up Obama and ask him a simple question:
Would you like your post-Presidency life to be personally nice and peaceful or personally rocky and unpleasant?
Then give Obama an ultimatum - knock off organizing and/or encouraging these protesters or pay a personal price. Remind Obamaramadingdong that he is no longer President and that Trump now is, with all the authority and power of the government that comes with it.
If I were Trump, Zero would get Zero of my time. He would also not be invited to any Presidential functions where previous President’s attend.
And, I would investigate him for the duration of my term.