Is the GOP a white nationalist party?

[Adam Griffin]

No - otherwise they wouldn't be universally supportive of Israel when it comes to foreign policy.

To be fair, a good chunk of white nationalists are very supportive of the "lesser peoples" who enforce similar components of nationalism within their borders and "keep to their kind". It's actually a pretty common talking point among them: something to the effect of "we don't want to get rid of them; we just want them to live among themselves and live where they oughta live", etc etc.