Ok, well that is not Stam yeynom. (Yeynom means THEIR wine.)
BTW, I believe you asked somewhere in the thread about why mevushal is better? The answer that the reshonim give, is that the gezeira of Stam yeynom was constructed based on the parameters of chashas nesech, though the main reason was because of intermarriage. (And they are not menasech mevushal + it is not used on our mizbeach)
Chazal did this for various reasons. Chief amongst them is that they wanted to establish the gezeira on a higher level of prohibition, similar to yayin nesech. So it had to match the parameters.
Great, glad we can discuss this without implying I have no respect for chazal.
If mevushal makes it ok because its unfit, it doesnt answer "mishum benoisahem" And we largely argue that nesech is no longer an issue, (different debate "is christianity considered avoda zara?")
My issue is that the halachot of nesech, were applied to stam. The issue at heart here is, why cant a waiter pour non mevushal wine ? clearly if it was an issue of benoisahem, it would deem mevushal wine foridden too.
I have not been turned off from marrying a non jew because they dared to serve me mevushal wine.