The anarchists worked together with the soviets, going as far as actually being a part of the red army and fighting together against the whites. Tensions between the two groups only rose because bolchevik commanders repeatedly attacked their autonomy.

That unity lasted until the reds had beaten the whites in moscow, after which they just invaded the Makhnovshchina.

The anarchists weren't all that nice and had oftentimes critiqued the bolshevists way of implementing communism, but they still worked together and tried to work with the Bolsheviks on equal footing. The Bolsheviks on the other hand repeatedly tried to undermine their autonomy and just betrayed them as soon as they thought that they didn't need them anymore and thus caused a civil war that killed 1.5 million people.