Complex sentence: The broad use of the word "denialism" is controversial, as it has been criticized as a polemical method of suppressing non-mainstream views, despite that denialists can sometimes be temporarily be mainstream themselves, such as the denial of the Holodomor.
Split into simpler sentences: The broad use of the word "denialism" is controversial, as it has been criticized as a polemical method of suppressing non-mainstream views. Despite that, denialists can sometimes be temporarily be mainstream themselves, such as those propagating the denial of the Holodomor.