Why did Trump order 800,000 people to dream?

Trump is a maverick among American presidents. He has been criticizing the immigration policy. The presidential decree issued today has changed the lives of 800,000 people at once, causing a lot of resentment. At present, many institutions have issued condemnation voices for this. Why does Trump's order cause 800,000 people to dream? The reason for this is the following：

First, the source of this incident comes from the Trump administration officially announcing the abolition of the special protection plan for immigrants established during the Obama era. As a result, the number of people involved reached 800,000. Thanks to Obama's policies, many people have found a foothold in the United States. Once the Obama policy is abolished, it is likely that these people will face unemployment and repatriation.

Second, Obama's plan to postpone the repatriation of children who arrived in the United States, or DACA plan for short, is mainly aimed at some children who arrived in the United States. Most of these people came to America with their parents. If Trump targets the waste paper plan, then these people and their families will be forced to bear tremendous pressure.

Third, Trump asked the US Congress to draft a corresponding alternative bill within six months, and the corresponding bill in the United States is likely to exclude some people accordingly, so many people will become illegal immigrants in the United States. At the same time, these people now have their own families and jobs, and a series of things will involve more people and cause serious social unrest.

Trump's plan caused a backlash. At present, many beneficiaries of DACA feel that their lives are facing a crisis, so now some descendants of immigrants have begun to collect support opinions from house to house, and many legal and civil rights groups have also called on Trump to keep DACA, including the famous enterprise Apple.