Some of my rebuttals

To summarize, this has started because of the major uprise of debate about immigration and illegal immigration. 

The focus is mostly on illegal immigration though. I put this together believing the following: 

1. Illegal immigrants are not stealing our jobs. 
(A) Because America is outsourcing (i.e. Dell support in India, GM factory in Mexico), regardless of whether or not an individual or family comes here to work (legally or illegally), they’ll still be “stealing our jobs” anyway because of corporations hiring outside of the country. 
(B) Because we live in a capitalist society, the individuals who DO have social security numbers can CREATE their own jobs (start a business). 

2. Illegal immigrants DO pay taxes. 
(A) They pay every tax EXCEPT for income taxes (because they work off the books, because they don’t have a social security number). BUT, they’re not getting as many benefits out of the money they spend on taxes like us citizens (social programs by the government). 
(B) On the topic of social security, a person basically saves money up for when they retire, through the social security program. By working a certain number of hours throughout their life, they become eligible to live off of the saved money. Illegal immigrants DON’T get this. BUT, illegal immigrants who use FAKE PAPERS (fake social security numbers) are benefitting an actual US citizen by working under their name/social security. So they’re contributing to another person’s “life savings,” really. 

3. Making it harder for immigrants to get visas (permission to come to the US) does NOT keep terrorists out. 
(A) Just like illegal immigrants come here undetected, terrorists do too. Scary, right? Here’s a solution. Make the process EASIER for immigrants to get visas. Why? That way everyone who comes to this country is documented in some way, and the government is notified of their arrival into our country. So no one comes undetected! In reality, though, the numbers of people coming to the US undetected would most likely decrease drastically. 
(B) After a visa expires, the immigrant is supposed to return to their country. Many immigrants become illegal in the sense that they stay PASSED the time they were supposed to be here. Why? America makes the applying process for either permanent residency or citizenship hard. The US embassy that the immigrant went to in their home country most likely paid very special attention to how much time they were allowing the immigrant to stay. Once arriving in the US, the officials there can even SHORTEN the time suggested by the US embassy in the home country. Why do they do this? Applying for citizenship or permanent residency is a lengthy process. The amount of time on a visa is given after considering that fact, making it harder for immigrants to apply for citizenship or permanent residency. 

4. We DO have room for them. MORE than enough room! 
(A) If you live in NYC, Chicago, or LA, I could see why you would think so. But step out of your own city and look at the rest of America. The midwest, the south, Alaska, and Hawaii. We have more than enough room. Maybe building more cities would (a) increase job offers and, (b) spread the population out more. Overcrowding is not an issue when how much open land America has is taken into consideration. 

5. The economy could only BENEFIT if illegal immigrants were given social security. 
(A) Giving an illegal immigrant permanent residency or citizenship would give them incentive to stay. How would that benefit our economy? Again, we live in a capitalist society. This means that the more consuming (buying) that occurs, the better off our economy is. Our economy could BOOM if this were to happen. Why do you think companies spend so much on advertising? They (a) know that advertising has some sort of psychological effect on consumers, which leads to point b, (b) they know that it will get you to buy their product (most of you), meaning they’ll make more profit, and our economy will thrive even more. Capitalism is based on consumerism. 

For whatever is being offered, money is always in the exchange. 
You can read up on circular flow in Wikipedia.

6. The obvious one: the only natives to America are the native Americans. 
(A) We have to keep in mind that there are a lot of people in America with diverse heritages. Their ancestors travelled here, mostly from Europe after Columbus, but other places as well. When the white man arrived here, the only people to be seen were Native Americans. As far as anyone is concerned, this is their land if anything. 

After doing some research, here are some more points I hadn’t thought of: 
- Undocumented immigrants might be afraid to seek healthcare, which could mean that they will spread disease to others. 
- Udocumented children are sometimes unable to attend school, especially college, which could lead to more poverty and crime. 
- If an illegal alien witnesses a crime, he or she might be afraid to come forward to authorities, for fear of being discovered. 
(Found from http://immigration.about.com/od/ussocialeconomicissues/i/AmnestyIssue_2.htm)