None of my multiple gay friends have ever displayed a rainbow on their profiles.
They are, however, openly gay on their profile.
No hiring manager wants to deal with drama, so it's not just rainbows, it's literally anything that that has a campaign and political force behind it, like Trump pictures, BLM links, climate change, conservation, nuclear power...
You reading the word 'ONLY' when one example is proffered is a problem in your end.
I literally don't understand affiliating rainbow emoji with pictures of actual political candidates or an actual explicitly political activist name.
I also don't understand saying climate change, conservation, or nuclear power has campaign/political force behind it. If someone had something to do with nuclear power in their profile I would just assume they worked in energy??? I am not reading politics into this at all dude...
It doesn't matter that you don't understand it, the idea is to get the interview over other candidates who focused solely on presenting the value they bring, and at the interview, landing the job over other candidates who are also focused solely on the value they bring.
You may not understand why hiring managers tend to avoid candidates who display non-work-related activism on their CVs, but that's just the way it is.
I have a connection on LinkedIn (garnered from the spam connect campaigns I talked about previously) that talks about his MtF transition experiences as well as the struggle to land a job. No one cares enough to do more than post "You go, girl!" and move on with their day. Good advice would be to tell this person that LinkedIn is not the place to talk about your bottom surgery, vents about potential unsympathetic employers, or your struggles to find a partner. A good hiring manager would check social media for any red flags, and this public venting is a HUGE one.