Original sentence: A second form of xenophobia can be primarily cultural, namely an irrational fear of the influx of an alien culture and irrationally perceived damage, and the objects of the phobia are cultural elements which are considered alien.As with all phobias, a phobia is an irrational fear; and a xenophobic person is aware of the fear, and therefore has to believe at some level that the target is in fact a foreigner.For xenophobia can comprise two main objects of the phobia.Recent immigrants can be a target, but this is a controversial area, as in many cases the fears of the host population are based on empiricial and objective evidence, which clearly means that it cannot be a phobia, since a phobia must be irrational and not based on evidence or even plausibility.The first is a population group present within a society, which is  not considered part of that society, but the fear must be an obviously irrational one to be classed as a phobia.This arguably separates xenophobia from racism(i.Xenophobia may also be directed against a group which has been present for centuries.ethnophobia, or phenotypophobia) and ordinary prejudice in that someone of a different race does not necessarily have to be of a different nationality
Edited sentence: As with all phobias, a xenophobic person is aware of the fear, and therefore has to believe at some level that the target is in fact a foreigner.For xenophobia there are two main objects of the phobia.Often they are recent immigrants, but xenophobia may be directed against a group which has been present for centuries.The first is a population group present within a society, which is  not considered part of that society.The second form of xenophobia is primarily cultural, and the objects of the phobia are cultural elements which are considered alien.This arguably separates xenophobia from racism and ordinary prejudice in that someone of a different race does not necessarily have to be of a different nationality