The murders,threats, and other criminal activities in '68, were against the police, armed guards, and just regular folks. So was about 99% of the IN YOUR FACE attacks on people.
Yes, MLK was murdered, as was RFK.
OTOH...today, GOP office holders, those in this administration, the president and ALL of his family members, and even someone just put up to be a Justice have been harassed, confronted, smeared,condemned, sent Ricin through the mails, hounded 24/7 in every kind of media, and worse.
It's difficult to say just WHICH year is "worse"; though '18 isn't over yet.
One thing to keep in mind, AMERICA WAS STILL AMERICA in '68, as that was the year that the damned STINKING COMMIES began their slow destruction of this nation's traditions, culture, manners, morals, education system, and the accepted meaning of many simple English words.
The FALN tried to assassinate Harry Truman in 1950 at Blair House, shot up the House of Representatives in 1954, and, in 1975, blew up Fraunces Tavern in New York where Washington had bid his officers farewell....