Dawit Kelete’s a massive piece of shit but almost certainly not a terrorist. He most likely knew the interstate would be blocked off at night (it had been nightly for a week or two) and took the opportunity to go hot rodding in his car. He definitely knew he illegally went up an off ramp since he has lived here in Seattle for a couple decades. Terrorism implies he did it for political purposes. There is occasional beef between East African immigrants and the black community here but there is no evidence of that here and he has no history of that. He also does not have a history of harassing the LGBTQ community which Summer was a part of.
What is also certain is that he did not accidentally go up an offramp like shit heads on the right have suggested. He has lived in this city for over 20 years. That is not some unknown offramp he would be unfamiliar with. He knew what he was doing was illegal and it got someone killed.