How do I handle another NCO pumping false perceptions of racism in to my unit?

This isn't about racism, it is about respect and/or power. If the NCO in question is feeling powerless in his position, (I.e. the work details were divied up without his input), he will try to find his power someplace else - and the racism card is a VERY powerful card to play. If he is feeling disrespected by current leadership, he will find leadership that does respect him. Likewise, if he does not respect his leadership (say, because they are doing things based on race, and don't even realize it), then he will find leaders he does respect.

You are peers. You need to sit down and hash this out and figure out what is REALLY going on. It is entirely possible that he DOES see racism that you do not. Find out what he sees, and then either accept his perception and fix yours, or explain to him that you understand his perception, but explain the logic that went into the decisions. Agree that you are peers, and you should be hashing this crap out between the two of you in the future, rather than bugging the 1SG, who has more important stuff to deal with. If you can't see eye to eye, bring in the PSG and have him/her counsel you BOTH in writing that NOTHING goes to 1SG without going through SL AND PSG first. And that failure to comply with that written direct order IS subject to UCMJ. (Nothing burns my buns more than jumping CoC.)

In my day the First Sergeant would of chewed the ass off the buck Sergeant for bypassing his Platoon Sergeant. Soldiers always have organized themselves into comfort groups while attempting to accomplish their mission as assigned. Bottom line is that his Platoon Sergeant needs to do some one-on-one counseling.

This soldier needs to be counselled with his squad leader about expectations and standards of performance!. Something appears to be lacking here?