Not sure why you've spammed that MLK Jr. quote across this thread as it really doesn't seem to apply.

Firstly you are assuming (or worse projecting) the identity of your interlocutors. Secondly "support of the movement" doesn't mean blindly following anyone that claims to walk with you despite historical evidence that they do not. Similarly critiquing the very real failures of a candidate with no track record of support is not "finding every available excuse." We should critique all our leaders because we want both for them to improve and to foster others to be better. Following based on lip service alone is some misguided messianic practice, and Platner ain't no messiah.

This disingenuous injection of MLK Jr's words feels no better than the right's jingoistic quote mining as an attempt to produce a diverse authority that agrees with them.

I highly doubt MLK Jr. would be in favor of a white boy with a Nazi tattoo who served multiple tours and signed up as a mercenary because he liked killing so much.