[4][need quotation to verify] In 1962, Giertych returned to Poland, where he completed his qualifications for an assistant professorship at the Institute of Dendrology of the Polish Academy of Sciences (PAN) in Kórnik near Poznań.

[5] In 1986, Giertych joined the advisory council (Rada Konsultacyjna), made up of opposition members and party officials set up by the leader of the communist authorities, Wojciech Jaruzelski.

[6] The council included several prominent Poles such as Marek Kotański, Krzysztof Skubiszewski and Kazimierz Dejmek, but also leading members of the communist party.

[9] Maciej Giertych opposed lifting the ban on purchase of land in Poland by foreigners (due to fears of resurgence of German colonialism), homosexuality and moral relativism.

He has supported closer ties with Eastern European countries (especially Russia), as well as defending Polish industry against what he regards as the unfair practices of western companies.

In general, the views of Maciej Giertych are in line with the ideology of Radio Maryja, a media group and political-religious channel of religiously conservative parties in Poland.

During his discourse Giertych had explicitly condemned National Socialism and insisted Benito Mussolini and Adolf Hitler also had an "atheistic and socialistic taste about them".

[10] In February 2007, Giertych sparked outrage among European Union officials and Jewish organizations by publishing a brochure called "Civilisations at war in Europe"[11] that claimed Jews create their own "ghettos" because they supposedly prefer to separate themselves from others.

[15] In his foreword to Gerard Keane's 1999 book Creation Rediscovered, Giertych documented how his views changed from assuming evolution is true to being skeptical of it.

"[17] On 11 October 2006 Giertych introduced and moderated a pro-creationist seminar held in Brussels for members of the European Parliament; The title of the presentation was Teaching evolutionary theory in Europe.