Proton is integrated with the Steam app in Linux, so usually you just install the game and then run it from Steam and it just works in Linux even though it's a Windows game, without you having to know anything about Proton.
Similarly you can use something like Lutris or Heroic which does the same for Wine and game stores like GOG (it's even integrated with the store and downloads the game for you, same as the Steam app does for the Steam store).
For some games you might have to learn enough to tweak settings, though for Steam and Proton that's often just changing the Proton version you're using for a game in its game launch settings in Steam, which is hardly complicated.
The need to really understand what's under the hood is generally only when leaving these standard paths: for example if you're trying to run a pirated version of a game (which might even be for perfectly legit reasons: for example one of my Steam games won't run in Linux no matter what I do, but the pirated version works fine, probably because of the DRM in the official version) or some old obscure game CD you have around, as the scripts in Steam, Lutris or Heroic that silently configure Proton/Wine correctly for a game might not at all exist for those unofficial or older installers.
It's only ever the European far-right, it's not even all of them and most of the ones which are influenced by America are pretty selective about what they take in because most of that shit in Europe is seen as seriously retarded shit even amongst the far-right here (for example, religiousity doesn't land well nowadays unless you're talking about really backwards places like Hungary, outside maybe the UK, nobody gives a shit about the ideas of the transphobes and there is zero support for the kind of gun ownership laws the US has).
Sure, some shit does leak, but the fully packaged message from people like Charlie Kirk would just not work anywhere around here.
My bet it that it was a handful of total unknowns amongst the European Far-Right who maybe get money from American sources (some European Far-Right parties were created with the money Bannon brought some years ago very openly to "create far-right parties in Europe" and I would be surprised if certain American interests had stopped buying such politicians in Europe) that suggested this and the others just went along with it.
When it, naturally, failed miserably to gain traction beyond that handful of obscure politicians, the newspaper owned by Germany's very own Murdoch-clone then described the reaction to that refusal by the overwhelming majority of the EU parliament to do it, as an "Uproar"