The country has always had a capacity to absorb immigration, and for the long range good. Problem is now, no limits. Those intent on letting anyone and everyone in of course are too stupid to realize that they are overwhelming and destroying the normal capacity of the country and organizations to deal with it. If you can help 1000 people effectively, but now add in 100,000, you can no longer help them effectively, even the first 1000. So in the end, you are not helping any of them and hurting the existing population as well as the newcomers. If there is no limitation to those who are legitimate "asylum" seekers, and no control on criminals etc. there is no benefit.
Worst is the states and cities saying "let 'em all in, we're sanctuary cities", then moaning "wait, we didn't mean send them here. You keep 'em in Texas, Arizona, etc." Hypocrisy of the highest order.