2) He has something to offer that more competent people don't: the willingness (or perhaps just carelessness) to piss people off. Democrats and most Republicans won't do crap about a conflict that some of their constituents support and some don't, they'll just straddle the rhetorical line forever. Trump, in both good ways and bad, does not see himself as beholden in that way, which lets him break the status quo. It doesn't matter how competent other people are if they don't actually try.
I actually agree for the most part: Trump IS willing to piss people off and may therefore do things others would baulk at.
Unfortunately, the caveats to consider are also
who he is prepared to piss off and
why. The problem with "why" is that his primary motivation is most likely to be self-aggrandisement, and the who is therefore whomever he doesn't like. A quick look at Trump's statements and attitudes suggests he is vastly more likely to break the status quo by handing Israel a blank check instead of the substantial one the USA already grants it. And sure, to paraphrase, there may well be peace once Israel has the green light to make a desert.
I would also point out from a certain perspective that Trump's willingness to piss people off is also inimical to general democratic principle, and why he's authoritarian. At the point a leader decides he doesn't need to care what the people think, or that he can steamroller a segment of the population in favour of another, start worrying about whether there will be a democracy at the end of his reign.