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.
It isn’t cowardly to think a war the wrong thing.
I opposed the Iraq War.
I opposed it as I supported strong military action, and felt that Iraq 2003 was an unnecessary war taking focus and resources away from a necessary war in Afghanistan.