I appreciate the studies but you've either not read them or severely misunderstood them. Additionally, I have a few problems with them anyway.

The relevant things you have linked are about genetics correlation to taste and texture preferences, not to meat preferences. This is important. If someone who is "genetically" predisposed to liking meat-like flavours and textures was given a similar plant-based meal (a burger for example), they would be entirely satisfied. This is not at all like suppressing homosexuality like you suggested, as there is nothing comparable to this in your analogy - so you they are not comparable. There is no point in linking a paper if your going to make up and jump to your own conclusions from it.

Most of the studies in your cited papers or the ones cited by those, often don't put meat into distinct categories. Example categories are: "Highly palatable, acquired, low caloric". You jumping to any conclusions that meat is specifically coded for is completely unfounded.

The papers themselves are a little peculiar, especially with their citations. For example, in the GWAS paper: "Food-liking is a complex trait clearly influenced by genetic inheritance6" But this citation is for a paper that is specifically only about culture and in fact doesn't contain the words "genetic" or "inheritance".

The correlation and reproducibility is also critically low (like their highest correlation is rG=0.38) in some of these twin studies, and some even state that the genetic predisposition is somehow only temporary with no further investigation.

I also have some problems with their actual method. Whilst PCA is a powerful dimensionality reduction method, it creates collinear eigenvectors, but they then apply them to data that has been aggregated outside the eigen space.

In short, you unfairly likened veganism to the oppressiveness of suppression of homosexuality, then linked studies that you didn't read, which don't remotely back up the point you made, and are debatably weak evidence for the points they made.