I disagree with probably the majority of Trump's main policy ideas, but I think a strong case can be made that his immigration policies are in the country's best interests. Not all of them, but as a whole.
What blows my mind is how liberals and progressives (of which I count myself a member) don't see to care that this is the policy that pushed Trump into office. Without it he would have flopped with just his MAGA core.
All you need to do to fix illegal immigration is to go after the employers. You know, actually enforce the laws. Streamline it. Declare it a national emergency and put more onerous requirements on businesses to verify legal status. Send ICE to businesses to investigate them instead of kidnapping people.
You'll probably find out pretty quickly that agriculture is extremely dependent on illegal labour, but so be it. Bring it into the light and have an actual debate. The current approach is all for show, or at worst, intimidation.
Immigration in general is good for a country, and relatively uncontrolled immigration is one of the reasons for America's prior economic strength.
Even if you disagree, Trump's policies have not been effective at anything, apart from creating headlines.
These same headlines have secondary negative effects for the US, like hurting international tourism.