No, objectively. Granted sama doesn't provide detailed references, but you can find factual backing for statements such as these ones easily if you look:
"A Trump presidency would be a disaster for the American economy."
"He has no real plan to restore economic growth."
"His racist, isolationist policies would divide our country, and American innovation would suffer"
"He's erratic, abusive, and prone to fits of rage. He represents a real threat to the safety of women, minorities, and immigrants."
Not that I want to split hair but in the examples you gave:
1) Subjective
This is an opinion, not a fact.
2) Objective
I agree. But that does not make him "objectively" wrong.
3) Subjective
Without starting a discussion about Trump alleged racism, whether or not a somewhat isolationist policy would either divide our country or make American innovation suffer is a matter of opinion, not facts. Some other prominent investors seem to disagree.
Besides, examples in our history would tend to show the contrary (I am referring to Roosevelt policies after the '29 crash).
4) Subjective
Unless SCOTUS rules that his stands are unconstitutional, it's only a matter of interpretation.
A Trump presidency would be an economic disaster: Objectively true because his policies involve reducing taxes, increasing spending, and isolating the country from free trade (eg. withdrawing from NAFTA which has been shown to have created jobs and growth on both sides of the border).
"American innovation would suffer": Because of economic consequences, so see above.
"He's erratic, abusive, and prone to fits of rage": I don't even know how you can argue against this, just watch one of his speeches.
"He represents a real threat to the safety of women, minorities, and immigrants": He personally is a threat to women, and his policies, such as they are, are now stiring up racial hatred. Again, an objective truth.
"Trump shows little respect for the Constitution": He announced several completely unconstitutional plans, such as suspending the right of US citizens to return to the country if they are Muslims. You don't need a ruling from the Supreme Court on this.
Except if you do believe the latter, and in that case any discussion is moot.