1) Waters did not call for “harm” to Trump supporters. She said administration officials should be made to feel uncomfortable in public
2) Considering how unhinged and gullible Trumpers are, the last sentence of Trump's tweet is the sort of thing that could get someone killed
"Congresswoman Maxine Waters, an extraordinarily low IQ person, has become, together with Nancy Pelosi, the Face of the Democrat Party. She has just called for harm to supporters, of which there are many, of the Make America Great Again movement. Be careful what you wish for Max!" - President Trump
Donald J. Trump (@realDonaldTrump) | Twitter