Spike proteins are the cause of blood clotting as well as the mechanism, afaik.
In a roundabout way yes. In the way the physician apparently quoted, no. To 'damage blood vessels' the concentration would have had to been 1.000.000 times higher. Its a different interaction mechanism in the way vector vaccines (AstraZeneca and J&J) reproduce but mRNA doesnt. (The vector virus had copies of it produced in cells nuclei (intended behavior, btw), while the mRNA had them being reproduced outside cells nuclei which lead to different properties.) Also its an issue so infrequent, that you couldnt reasonably detect in in stage 3 trials. And when it was detected during vaccination runs, steps to reduce the issue were set by governments in the west. Also the statement that its both an issue with AZ and J&J is somewhat problematic if you take into account the very low number of reported cases in the US administration case, with J&J. So low in fact, that its out of 'you'd have to do something about it' range for US populations. If you vaccinate half of the US citizenry, and you have six cases in total... theres not that much you can do about it. But at the same time, its probably not something that should keep you awake at night, because on the statistical reasoning level you prevented much more harm than you dished out.
The interpretation that it was 'spike proteins' that damage blood vessels afaik is not correct. And then the question arises, how did that physician come to that conclusion. And the first thing that comes into mind at that stage is, that he heard spike, and did some free associations with pointy and blood vessels, and thats not good. And at that point, at the latest, you start to wonder, how a cardiologist (not a virologist) can make a mistake like that, then tell people not to get vaccinated, based on 6-100ish reported cases of that occuring in the US, while misrepresenting the mechanism. And ignoring, that a spike protein is something man viruses have - without killing the host altogether, because that would also kill them. And then it being misquoted by a 4chan post suddenly not differenciating between vaccines anymore, which then you are using to construct your story from.
This thing has more holes, than connections you can make.
Ands thats just one example of the stuff he spread, all of which was problematic - and misleading - next thing is the statment, that 'natural immunity' is better than the vaccine. No its not. Especially not after the first booster shot. And especially not concerning mutations.
A human being that goes out there and tells the public, with no expertise in the field, something thats factually wrong, and then follows it up with 'getting it naturally is better than getting vaccinated', without thinking for a moment about the harm he produces, frankly should not be someone who is featured in anything but a meme on a 4chan like image board.
And you are still dancing around the fact, that the entire posting was designed to get an uneducated person to respond emotionally. Promote conspiratorial thinking, has no foundation in actual procedual logic, nor in statistical risk assessment - and only exists to make people afraid. Of something that has no - literally no bearing on reality.
Something something, spike protein, is not enough, I'm sorry. Thats not the cause of the problem. Even if spike sounds spikey.
And creating meaning by association is also something that is used in manipulating masses, not in scientific work.
So we have to come to terms, that the 'good doctor' likely read a paper. Misinterpreted its contents, babbled out a conection as a 'functional mechanism' that they made up in their mind. And then went on to injest the frigging fear of god in people, based on something the statistical risk assessment shows might not be even enough to give out a warning - which could be missunderstood. And then the 4chan post made five times more sure it was misunderstood, by focusing not on what he said, but what a swell guy he was, namingly someone who would save the world with a miracle cure, that was not a vaccination -- something that plays straight into Trump narratives at a time, before he himself got vaccinated.
So stop being the flipping troll pulling out a fake association to a word like spike protein out of your flipping hat, when the good doctor got everything wrong he could have gotten wrong. And the entire post you share was designed to play the emotional strings of people unable to do any research. Unable to look up the statistical risk related. Unable to know that several different vaccines exist, and are not even affected (statistically).
While at the same time having nothing but the utmost benefit of the doubt for the good doctor, that is practically jesus, and was prevented from saving the world with his miracle cure.
Oh and which has factcheck articles online denouncing him as misleading and factually wrong - and who hasnt even cared to respond. I dont know what image you have of the scientific field - but thats not enough. By a flipping longshot. But then your sole source of info are image board spreading dark PR for people that want to life in a world, where it was 'so close' that all of them were saved, but then sadly, the big conspiracy came along and...
You just dont know how madening it is to see you leading yourself around your own nose, making connections up out of thin air, promoting 'I think it has something to do with the spike protein, and thats enough for me', once others (me) have laid out to you that the 'good doctor' got the entire mechanism wrong by which the side effect is triggered. Because he isnt a flipping virologist, and not someone thats an expert in anti immune responses.