Earlier quoted context omitted.
I don't think the EU will be moved by this. They can easily wait till the UK exits without a deal then be in an even stronger negotiating position.
You understand the concept of 'mutual', right?
That's not a very convincing lever in a negotiation. The final relationship will benefit the EU far more than the UK, simply because of the balance of power, regardless of delusions to the contrary and empty bombast from Johnson.