It's a mix of many things, some of which are more specifically American (e.g. puritanism) and others less (e.g. two-party system effects). Twitter is present ev

It's a mix of many things, some of which are more specifically American (e.g. puritanism) and others less (e.g. two-party system effects). Twitter is present everywhere, but the importance it is granted also varies a lot from country to country. That is again local culture.