I don't agree. If you align with the aims, you align with the methods to get those aims across. I don't think you cannot abdicate personal responsibility of how organisations/pressure groups like Antifa work/operate just because you align with their ethos.
Otherwise can someone, in theory, say I align with the Nazis mentality of racial purification in Europe, but not the methods they do it get there? Therefore I support the Nazis but if they murder some Jews, oh well? It's an extreme example, but nonetheless.