Are you calling the British forces who fought in Iraq cowards?.
No, but I am calling the British population at large cowardly, since IIRC the population at large never supported the Iraq War, and has always been unwilling to make the difficult choices needed to fight terrorism. Tony Blair was largely awful domestically, but at least he and the British Army were willing to make difficult choices. Americans in general may be cowardly now, but at least they were willing to make sacrifices at points during the War on Terror.