Ordered and peaceful ethnic cleansing is a contradiction in terms.
No, all ideologies disagree with other ideologies, but not all ideologies advocate marginilisng and excluding certain groups of people like fascists do. AntiFa want to stop people like that causing conflict and acting out on their beliefs, because they are a threat to tolerant, peaceful and accepting society. I don’t know what’s so hard to understand, it is not possible to live in a tolerant society when you allow intolerant people to cause conflict and discriminate against others.
As for the links, half of them are in a language I don’t understand. The situation in the Finland video can not be properly seen. The Yvette Felarca video shows a racist with a weapon being disarmed by a group. The NPI dinner protest was completely peaceful. The Richard Spencer punch was unprovoked, but I think justifiable: the guy is advocating ethnic cleansing, whilst not directly inciting violent behaviour, he certainly is an indirect cause and he knows it. I think people like him deserve to be punched, they are clearly out to discriminate and cause conflict in our society, which should be met with strong opposition.
Besides, AntiFa violence is infrequent and usually a mild scrap, I don’t think you have enough evidence to denounce the entire Antifa community as extreme violent thugs.