Interesting points and very balanced view. It's a tricky one - should their holding of the prevailing racist and classist views seriously undermine their achievements and sacrifices in the campaign to get the vote?The answer is, as always, it depends – I think. I'd preface this by saying we're moving into an area that I'm not as familiar with as I should be, so I may be oversimplifying.
But the issue is, as always, that historical figures are products of their time and even ones that did a lot of good held opinions and ideas that are out of step with what we consider right now. That's true for the suffragettes as much as anyone else.
As the fight for suffrage was a global movement there were worse expressions of marginalisation in some places than others. Susan B. Anthony came out with some incredibly questionable stuff in the US, and there's always a pervading sense that the campaign for female suffrage separated itself from the campaign for racial equality because they thought it might damage the movement.
In the UK the issue is less clear cut, perhaps, but still there. Emmeline Pankhurst, despite her fostering of the still troublesome 'I'd rather be a rebel than a slave' motto became a huge supporter of Empire, and Fawcett is reported to have been incensed that Maiori women in NZ received the vote before white women in the UK. There was always a bit of a sense of 'well civilised white women in Britain should have the right to vote if the uncivilised brutes elsewhere in the world do'; that came with the territory of Britain's colonial mindset.
Some leaders were, at best, uninterested in the fight for working class women's right to vote. The Pankhurst's fell out over the issue with Sylvia Pankhurst later saying that Emmeline had said “a working woman’s movement was of no value; working women were the weakest portion of the sex, how could it be otherwise? Their lives were too hard, their education too meagre to equip them for the contest.”.
However we choose to square the circle with the good they did, and however future generations choose to do so, it's a part of the fight that deserves not to be forgotten.
It can't entirely, but it's troublesome all the same and shows the limitations in their outlook I guess. Any bloke gunning them down over it is on pretty thin ice though I'd say, given that at the time they were mostly racist, classist and sexist.