Tories are also nationalists: "BBC chief told to use 'more than one union jack' in annual report
Tory MP asks Tim Davie how many union flags were pictured in the corporation’s financial document"
(
https://www.theguardian.com/media/20...-annual-report)
In fact, if you're against nationalism then I think Labour, Greens or Lib Dems are your best bet.
Wales loses seats in the next round of Westminster elections so say in events is going to decrease. For me that makes the Senedd elections even more important and even more important to get engaged with Welsh politics before making a decision. Podcast on Welsh politics can be found here:
https://soundcloud.com/hiraethpod