The working class of the textile mills were dedicated admirers of Lincoln, even when the war meant they were out of work. The Reform Act of 1832 had given a great many of the working class the vote. Additionally, a significant proportion of the middle and upper middle class were evangelicals who had always supported the anti-slavery movement and in particular, William Wilberforce. It's not as though i'm ignorant of the history of Great Britain. I think it would have been great political stupidity for Palmerston to offer support to the southern confederacy. Witness his purported willingness to support the southern confederacy, it they won a major victory--which he is said to have proposed to Russell, just after the Army of Northern Virginia had won just such a victory
. I don't admire Palmerston, but i don't underrate him, either. I think he had too much sense for that, and a long, successful political career, including a great deal of time holding the foreign portfolio suggests to me that he would not have blundered that way, no matter his personal antipathy toward Lincoln. You may, of course, disagree. But don't assume i've not read more than one life of Palmerston, or that i'm not well informed about the political or public opinion situation in Great Britain in the 1860s.