Look at the picture where this person has a red jacket . Do you notice the medallion ? it is a Celtic cross. Here is the explanation from
Wikipedia:
explanation-wikipedia
Variations resembling the Celtic cross, and the sun cross from which it is derived, have been adopted by some white nationalist and neo-fascist
groups. These supporters usually use a very basic variation of the design which is made up of simple lines, without any of the ornamental complexity
of traditional Celtic crosses. In these recent adaptations, it is sometimes also called a sun wheel. It is unknown why these groups have adopted the
cross, but it is thought that this basic variation's minor resemblance to the swastika is the reason it has become popular. It is important to note
that those with modern-day Celt connections, such as the peoples of Ireland and Scotland, do not have any association with these radical groups, and
that the use of a cross bearing resemblance to their own Celtic cross is strongly condemned by those in such communities.
The symbol can also sometimes be identified with radical nationalists of a Third Positionist or Catholic nationalist persuasion.
This new political connotation has almost eclipsed the traditional meaning of the symbol in France, Italy and many other European countries. In
France, the symbol was adopted by the groups Occident and the Groupe Union Droit. In Italy, the symbol has been banned from being shown within
stadiums, as it is considered a sign of fascism and racism.