I need to clarify something

It is very sad to think that illegals are the reasons why in the US, there is a lot of pedophilia, sexual and child trafficking,

This is not something I believe, nor most. There is a difference in legal and illegal (even among the illegals who come here, many have no bad intentions) immigration. And the elite who profit and participate in this sick trafficking and rape of children are people not only born here, but in powerful positions within our corporations and government. These elite who are running it consider themselves in my opinion above national boundaries. They are the ones insisting the border be porous so they can transport people and drugs and whatever else they want from country to country without there being questions.

a developed country needs immigration

While this is a separate issue, I can say from my point of view this is not true. From the 1970's to now we have increased the population from 203 million to approximately 324 million. In this time traffic has congested, housing costs have risen with demand and government welfare programs have grown to accommodate. You mention the need for qualified (skilled) people, and I would say this problem was created by the very elite causing the drug and sex problems. They have made a mockery of the education system here, as they want a population who is incapable of critical thinking. There is also a bias against hiring qualified Americans as they push to increase the size of the population that have no nationalistic sympathies. All outside the scope of this post, but wanted to address some of your thoughts on this.

The real church is in your heart, my heart and everyone's heart. If you can think and love and act on it, your church (the world you touch) will reflect that truth.