Perform Ajax Fetch in a Redux Reducer?

I'm trying to wrap my head around accessing the state inside Redux actionCreators; instead did the following (performed ajax operation in the reducer). Why do I need to access the state for this — because I want to perform ajax with a CSRF token stored in the state.

Could someone please tell me if the following is considered bad practice/anti-pattern?

export const reducer = (state = {} , action = {}) => {

    case DELETE_COMMENT: {

        // back-end ops
        const formData = new FormData();
        formData.append('csrf' , state.csrfToken);
        fetch('/delete-comment/' + action.commentId , {
            credentials:'include' ,
            headers:new Headers({
                'X-Requested-With':'XMLHttpRequest'
            }) ,
            method:'POST' ,
            body:formData
        })

        // return new state
        return {
            ...state ,
            comments:state.comments.filter(comment => comment.id !== action.commentId)
        };
    }

    default: {
        return state;
    }
}