Yes it's only a name, but it's an unpopular name - a name with connotations. Likewise being against socialism, 'anti-socialist' sounds 'antisocial', as in 'antisocial behaviour' - drinking in public, defacing property, playing loud music etc.
A name with negative connotations because your every day Joe Bloggs cannot separate the actions of a man, and a political ideology that he took and twisted to his own end.
People are stupid Adam.
Stalin was a Socialist. So why doesn't Socialism carry the same negative connotations?? "Oh yeah, because we were allies in the war against Hitler, who was the enemy, who was also a ----, so National Socialism is wrong and Socialism is good!"
This is literally how people think mate, they are thick as poo fella.
Never mind that both men were responsible for the same amount of murder and were just as evil as each other. Also, never mind that Socialism and National Socialism are extremely similar, one of the only differences being the move to self-sustainability with the latter plus the need to look out for number one first.