The overwhelming majority of South Asians — like Sundar Pichai (CEO of Google) and Satya Nadella (CEO of Microsoft) — who came to the United States are members of already wealthy families in their native lands overseas.  Consider Indians. Before coming to our country, they often already received a college education in India, where many people are still impoverished and illiterate. These elites come to the United States because they want to obtain lucrative jobs in order to become even wealthier.
Such Indians believe that Indian culture is better than Western culture. (Since they enjoy lives of privilege in India, why would they think otherwise?) They refuse to assimilate into Western society, retain their Indian names, and give Indian names to their children. Such anti-Western immigrants favor celebrating Diwali festival instead of Christmas. They inculcate their children with the anti-Western notion that Indian culture is superior to Western culture.
What is the mentality of immigrants who do assimilate into Western society? Consider the father of Daniel Inouye. Before Daniel Inouye departed for the training camp of the U.S. Army, his father told him, "America has been good to us. It has given me two jobs. It has given you and your sisters and brothers education. We all love this country. Whatever you do, do not dishonor your country. Remember –- never dishonor your family. And if you must give your life, do so with honor." 
Who is Daniel Inouye? He is a former senator from Hawaii. His attitude and the attitude of his father toward American society were common among many immigrants who came from Japan and Europe in the first 65 years of the 20th century. 
Such a pro-Western attitude does not exist among the millions of more recent immigrants and opportunists (who came to the United States by directly enrolling in an American university) from South Asia. Consider Sikhs from India. With assistance from the Sikh Coalition, they used lawsuits to demand that the Department of Defense (DOD) allow them to maintain a beard and to wear a turban.     Consequently, the DOD granted the Sikhs permission to maintain this aspect of their native culture at the expense of Western culture.     Additional Sikhs with assistance from (again) the Sikh Coalition are now demanding that the United States Military Academy stop requiring them to wear the traditional, ceremonial hat during military parades. 
South Asians view ordinary Americans of European (or East Asian) ancestry with arrogance and scorn. When South Asians run companies in Silicon Valley, they clamor for H-1B visas even when there are thousands of unemployed, ordinary Americans who are ready to work.
The presence of South Asians damages Western society.note
1. "A model minority: How Indians triumphed in America", "The Economist", 2016 November 26.
2. "Daniel Inouye: A Japanese American Soldier's Valor in World War II", National Park Service, U.S. Department of the Interior.
3. Kevin Lilley, "Sikh Army captain sues DoD to keep beard, turban", "Army Times", 2016 March 1.
4. Corey Dickstein, "Sikh soldier’s lawsuit stops Army test; seeks to keep beard, turban", "Stars and Stripes", 2016 March 1.
5. Kevin Lilley, "3 Sikh soldiers file lawsuit to keep beards, turbans", "Army Times", 2016 March 29.
6. Corey Dickstein, "Sikh Army enlistees file lawsuit seeking beard, turban exemptions", "Stars and Stripes", 2016 March 30.
7. Lorraine Bailey, "Sikh Cadets Object to Wearing West Point ‘Tar Bucket’ ", 2017 August 14.
8. Dave Philipps, "Sikh Captain Says Keeping Beard and Turban Lets Him Serve U.S. and Faith", 2016 April 1.
9. Corey Dickstein, "Army grants 3 Sikh enlistees beard, turban exemptions", 2016 April 11.
10. Frances Kai-Hwa Wang, "Army Grants Accommodations to 3 Sikh-American Soldiers to Serve with Turbans, Beards", 2016 April 12.
11. Corey Dickstein, "More bearded, turbaned Sikhs join Army as Pentagon reviews religious articles ban", 2017 February 24.
12. In an op-ed published by KQED Radio, Misa Sugiura stated that her parents embraced assimilation into Western society. "When my parents came to America in the late 60s, they came prepared to embrace a brand new life. Instead of a trunk full of old Japanese holiday traditions, they came with an empty calendar to fill with new American ones." This attitude differs starkly from the attitude of the typical South Asian.