@inthehands thankfully, I have not seen "racism is just class war" (which is demonstrably false).
i think the two questions are (1) which problem can you gain more leverage over more quickly (2) which problem impacts the most people, thus impacting the answer to (1).
i'm a little ambivalent; arguments that you can do both at the same time seem to be poorly supported by most real world history. still, to actually pick one of tf the two is all kinds of challenging and likely unwise.