I was hesitant to read this series at first based on the comment made for "Sweetness Follows." Like that poster, I just don't see Ray Vecchio as homophobic; I don't see any evidence for it on the series. Yes, he was raised Catholic, but he's obviously not very devout because he's divorced - which is a big no-no in the Catholic church. If he was devout, he would have annulled his marriage to Angie, instead of getting divorced. So I can't point to religion as a reason for RayV's homophobia. I'm not sure about his cultural background being a reason either, as he's demonstrated from his friendship with Fraser that he can, and does, accept those who are different.
So - I would expect RayV to be startled by Fraser being gay and in a relationship with Kowalski, and worried about how the RCMP and the Chicago PD would treat - but feeling sick and throwing up at the thought of Fraser and RayK together, and needing a drink when he sees them kissing? Very unrealistic - and absolutely not necessary to make the case for F/K slash, if that's what you were trying to do.
I am glad that RayV is portrayed more positively later on and desiring to still be friends with Fraser, and Fraser still wanting to be friends with him. And I'm very happy to see Fraser caring enough about RayV to stop him from drinking, and worried enough about him to go looking for him.
But again - what's the point of the homophobia? Making RayV homophobic, even if it's couched with care for "Benny," is just going dS fans who really like RayV and love his relationship with Fraser (whether it's a very close friendship only, or a close friendship that later leads to romance). Again - it is NOT NECESSARY to make one Ray negative to set the case for Fraser's romantic feelings toward another Ray, and since the Ray Wars are long over, I'd really like to see stories of this type not be written anymore. I'd also like to see stories that put RayV far away from Fraser when he and RayK are a couple not be written anymore - why can't they all be in the same city and be friends? And, in your story, why must RayV be away from the 27th? (Although I would hope that Fraser and RayK both recognize Fraser's desire to keep the friendship strong and so spend ample time with RayV)
After all - Fraser loves, needs and wants to spend time with both Rays; that is a fact that is supported in series canon. One Ray cannot be everything to him; he needs a best friend as well as a lover.