Where did I claim those types of numbers? I just pointed out that skilled manufacturing jobs tend to have multiplier effects and support jobs in other industries and provided a reference to that end. This is work by a serious academic economist, based on real data not the hatchet job by a bumpkin who likely has trouble counting on both hands.
Serious work has only looked at effects on job creation (as I pointed out if you had bothered to read): it doesn't necessarily follow that the same numbers are at risk of losing their jobs. After all the economy will adjust in other ways to a negative shock among other things, the cost of labour will fall as unemployment rises, making it easier to reemploy displaced people in other industries which will offset those initial job losses. But kudos for showing a more limited understanding of the economy than my dog.
So my point was quite modest: whether you accept the 900,000 figure or any other figure (I'm sceptical of precise forecasts as I've endlessly pointed out on here), direct estimates are likely to underestimate the effects because they don't take account of the wider interactions that Moretti and others have expertly documented. But you keep doing what you do and spinning your scare stories to an audience of one pal