It is clearly not the same thing, but to some extent you are right. People are naturally tribal and I think that the brilliant way in which racism and sexism and homophobia have become so much less acceptable has left many needing some other way to feel part of a group.
Music used to be one such way for the young, but music tribes have disappeared too. Football is a good outlet. Anti-cycling groups is not a good outlet, it is bullying and pathetic and is directly in opposition to rationally making the world a better place by virtue of improving health and reducing congestion and pollution.
Consuela says "No" for about 30 seconds - YouTube