I'm probably a little meaner than most. 'Bros before hoes' is similar to 'My country, right or wrong'. It's a bullshit statement either way. I generally backup whichever side I truly believe is right, regardless of consequence. People need someone who is willing to tell them what they need to hear as opposed to what they want to hear. If someone you loves is being a dumbass, they deserve to have one honest person who is willing to say "Dude, I love you, and I'd take a bullet for you, but you're being a dumbass. Stop it."
This doesn't mean you need to seek argument or make life deliberately difficult for yourself, but at some point if someone you love is clearly blind to something, you should be willing to point it out.