https://www.fraserinstitute.org/sites/default/files/UnionsandRightToWorkLaws.pdf
"While under many union membership agreements existing non-union status was a valid reason for remaining outside the union (in two-thirds of the sample analyzed by Gennard et al. 1979: 1091), many others were more rigid and recognized only religious objection. A famous example of the latter is the UMA negotiated between British Rail and its three railway unions—the National Union of Railwaymen, the Associated Society of Locomotive Engineers and Firemen, and the Transport Salaried Staff Association. Some 43 employees were unwilling to join a union but, having no religious objections, were duly dismissed. A number of these workers then petitioned the European Commission of Human Rights for relief. The case went on to be heard by the European Court of the Council of Europe, which found for the dismissed railwaymen in 1981, stating that their dismissal was incompatible with the “pluralism, tolerance and broad-mindedness”
of a democratic society (see Hanson et al. 1982: 102)."
So if the European Commission of Human Rights essentially proscribes closed-shops, then according to your logic, Europe is all pro-Trump?