Portals maintain velocity. Velocity is relative. Therefore the velocity they maintain is the relative velocity of the portal and the subject. Any other way and there would be no consistent way to pass any moment when passing through a portal.

Checked out this guy's profile, once again the fake enlightened centrist is really just a right winger.

The Green Party is a mouthpiece for Russia. Look at this recent press release: https://www.cornelwest24.org/war_climate_and_my_presidential_campaign

I was going to try to explain how insane this release is, but honestly just read it for yourself.