I guess the question is how they self identify.
This is a far from simple question.
For instance I'd say anyone who moved here from england or anywhere else, and made efforts to learn Welsh held the place and people in genuine affection.
However, just as in the lake district, or the dales, there is distinct resentment at buying up of local property for holiday homes, or just as dwellings for high prices, and pushing house prices out of the reach of local first time buyers. Or most locals for that matter.
When this impacts adversely on the fragile state of the Welsh language, as it undoubtedly does in a way not seen in the lakes with english, there will be resentment on that score as well. Particlarly if incomers choose to still identify as english.
I don't think you can directly equate this with england, as english is most certainly not a language under threat.
So, like it or not, and I'm not sure I do wholely agree with it, retirees and second home owners, who move to Wales to live in a bubble and displace locals will not be viewed with much affection. Oh, they have a perfect legal right to do so, and be regarded as equal in every way to the indigenous population, nevertheless it can be argued they are blinkered and insensitive to do so.
Particlarly if the insensitivity they show extends to voting brexit in their adopted country, a country not so inclined.
NB I observe incomers moving here, making efforts to learn Welsh, embracing local culture are generally welcomed warmly.
