Should Trump Stop the Government Diversity American Lottery?

Diversity American lottery was created in 1990 and adopted in 1995 with Bush father. why? it was a program which allowed the immigrant to come with a permanent residence card and work legally in America.
at the beginning, people were thinking that this program was made to help foreign country around the world, but the reality is that this program was created to help America industry and help America economy. We all know that this country was build with the immigrants coming from everywhere. and during all this time until now native American didn't develop the passion of hard work and endurance it's why in 1990 Bush father saw that and decided to use the strength of people who were suffering, or people who were dreaming about changing their life or people who were desperate, he decides to use all those people to make America great again because at this time until now America needs people who are willing to work hard to keep this country great.

President Trump saying that stopping this program will reduce the terrorism in America. The shooting in last vegas wasn't an immigrant. The October 1978 University of Missouri, Larry Ward shout a group of student it was not an immigrant but a native citizen or John Daniel Christian who shoot his teacher was not an immigrant. Maybe President Trump doesn't know America History or Maybe he refuses to know the history because the immigrant is giving to America more than they are received. when an immigrant work 16 hours daily it's because it because it was nobody empty  to work there.
shutting down this program will be a big mistake because before to shut down something which was in place more than 20 years you need to educate your population about a lot of things not just came one day and said I will shut down this program, who gonna work in your industry?  America citizen are willing to get up at 4, 5 am to go to work and work more than 10 hours per day? maybe one day but not now.