Definition
Objectivism states that it is morally wrong for one person to initiate force against another.
Murders committed (USA, 2016)
Whites: 4,192/(0.769 * 323,127,513) * 100,000 = 1.69 per 100,000 persons
Blacks: 4,935/(0.133 * 323,127,513) * 100,000 = 11.48 per 100,000 persons
Thus blacks are 6.79 times as likely to commit homicide as whites
>https://ucr.fbi.gov/crime-in-the-u.s/2016/crime-in-the-u.s.-2016/topic-pages/tables/table-21
>https://www.census.gov/quickfacts/fact/table/US/PST045216
Welfare use (USA, 2016)
Whites: 11,405,000/(0.769 * 323,127,513) * 100,000 = 4,590 per 100,000 persons
Blacks: 26,884,000/(0.133 * 323,127,513) * 100,000 = 62,556 per 100,000 persons
Thus blacks are 13.63 times as likely to receive welfare as whites
>https://www.statisticbrain.com/welfare-statistics/
>https://www.census.gov/quickfacts/fact/table/US/PST045216
conclusion
Use of force against persons who advance multiculturalism and immigration of non-whites into white countries is morally acceptable because it is an application of force in defense of your life and property.