No offense but at this point it's become obvious you haven't read much on it. And you keep going back to points I addressed but rather than responding you repeat your first point as it's new again. But for the sake of education, I'll try again.
Let's start with trade agreements. YOU DO NOT HAVE TO WITHDRAW FROM TRADE AGREEMENTS TO DO 90% OF THE THINGS TRUMP IS PROPOSING. You can build the wall, block visas and seize remittances and never leave the TPP, NAFTA or the WTO. The only area where you might have problems is tariffs and the agreements already allow for tariffs, even if they're not always enforced. Seriously, how many times are you going to type the same thing without responding to what I wrote? You do not have to leave the trade agreeements to do what Trump is proposing. I've typed it 2x, I hope it sticks.
As for various ways to punish under the trade deals, moratoriums and retaliatory tariffs are both within the rights of either coutry under the trade rules. A simple method (from a past event) would be to claim that certain Mexican products or services don't meet new U.S. guidelines and freeze them from operating in the U.S. Mexico could challenge but it would cost time and money. The same with retaliatory tariffs (something Mexico has employed in the past), which can be unilaterally applied and then time and money is spent fighting them. While that's happening the companies/economies affected are losing money.
As to the economics of the wall - read anything on the idea of remittances and one of the common criticisms is that crushing Mexico's economy by withholding remittances would send more illegals towards us. Everyone basically realizes that we could significantly harm your economy and the fallout to us would not be a similarly harmed economy. It would be more illegals. So, it will always cost you more than it will cost us. We might lose more than the cost of the wall...you might lose an entire period of prosperity. That's not even remotely close. We waste more on empty programs than this would cost us. Mexico can't afford to waste an entire economy. Just read some stuff because even the critics of the wall acknowledge the massive economic damage that would happen to Mexico.
This is how I know you're not informing your arguments. You're claiming that things won't happen that even people who are against the wall claim will happen.
1.- Actually you do, because the remittances are not going to break Mexico, the low oil prices for which Mexico depended, didnt broke Mexico at all. Because Mexico has a free floating currency, so it balances itself quite quickly, the peso went from 13 a dollar to 17.5 a dollar and it has remained there for quite a while with inflation still remaining low (under 3%).
I would assume that losing remittances (again ridiculous, there will always be ways to send money abroad, losing western union is nothing compared to the time where there werent even wired transactions to begin with), would simply jump the peso back a few more units up, that would mean less imports from China and more exports to the USA.
You also talk about the risk of straw remittances, how does that even works? how does that even gets coded into the law? You cant send money abroad if you are sending it for an illegal, how does that gets worded in the law to begin with? pretty much every illegal has tons of relatives who are legal, these guys would simply go to western union instead of the illegal with absolutely zero risk whatsoever.
You try to draw a crappy analogy with straw purchases, but those can actually be proven in a court of law.
2.- You keep claiming that the US can impose tariffs at will, no it cant. Not without leaving NAFTA, TPP and the WTO.
3.- Those guidelines work mainly on the food industry, which is just a tiny part of the US exports, if we are talking about manufacturing, there is no leg to stand on, because of once there is no manufacturing guidelines for making a shirt, and because most US based companies are already certified.
4.- Again, your whole argument is that Mexico depends entirely on remittances, which is a joke, it doesnt. And forbidding Mexicans from visiting the US would actually strengthen the peso.
So yes, the US could do whatever it wanted to Mexico, but your ideas are far-fetched and not politically feasible, at this point you could be very well arguing that the US would threaten to bomb Mexico in order to extort money, and thats not going to happen. Your view on the world is infantile at best.
And please, im the less patriotic mexican in the world and so is my dad, but if the US tried to extort money out of Mexico i would stand by the politician who doesnt caves, i lived the 1994 crisis as a teen which nearly left my family on the streets, you cant possibly speak to me about economic hardship and what can we take or not.