It's like pissing into the wind, but a few points.
The days of China just making cheap junk for the dollar store are pretty far in the past. About half of US imports from China are electronics, electronic equipment, etc. Obviously China does still manufacture clothes, toys, etc. much of that has moved to other countries with lower labor costs.
China is also very good at electronic manufacturing. Chinese factories can produce very high quality, high yield products. They can also produce junk. It really depends on how much you want to pay. In my limited manufacturing experience, we actually had one product that a Chinese factory could produce better and more consistently than a US one (in addition to being 40% the cost).
Buying American for many products is simply not possible, at least not for a number of years. US factories for things like cables, electronic components, etc. mostly only exist on a small scale or not at all. To bring these factories back would require massive capital, a number of years, and then not be able to compete with foreign, non-Chinese factories.
Foreign, non-Chinese manufacturing is a possibility. Some companies have been moving manufacturing for quite a while as Chinese labor prices have increased. For more difficult products, like most electronics, there is more risk involved and the company often needs to build the factory and train the workers. Obviously this is only possible for very large companies, takes many years, and is better suited for more mature product lines.
In general, the business community wants to stand up to China in a number of areas and force changes. However, a trade war will be very painful for businesses and US consumers. Similarly, it will also be bad for China and their economy. Many are optimistic that the current tariffs are just part of the negotiating process and will not be long-term. It's like a giant game of chicken and who is going to swerve first.
Of note, China's recent tactic of reversing previously agreed upon points right before finalizing a deal is a common Chinese tactic. Agree to some things right at the beginning, spend time ironing out the final points, and then right at the end go back on something decided early in the process. The goal is to get the other party to just agree because negotiating is annoying and they want to get it finalized.
Oh, and any points about the Chinese citizens being in unity or whatnot are mostly non-sense. I'd be in unity too if the government is going to put me in jail for speaking out.