I've seen several examples of "aggression against democracy" (the term used by bearish) of late, none from Poland.
item: the remainers in the UK refusing to accept the result of the Brexit referendum and demanding another referendum
item: the establishment and the left in the US refusing to accept the result of the 2016 presidential election and manufacturing the phony "Russian collusion" narrative in an attempt to remove the president from office
item: the EU rerunning referendums until they yield the desired result
Denmark reran the Maastrict Treaty referendum (1992/1993)
Ireland reran the Nice Treaty referendum (2001/2002)
Ireland reran the Lisbon Treaty referendum (2008/2009)
item: the Greek bailout referendum 2015
61.3% against, turnout 62.5%
A referendum on the bailout conditions in the Greek government-debt crisis. A majority of the voters rejected the bailout conditions. However, shortly afterwards the government accepted a bailout with even harsher conditions than the ones rejected by the voters.
item: the spanish authorities using force during the Catalan indpendence referendum
item: the 2014 Ukrainian coup
The Ukrainian revolution of 2014 took place in Ukraine in February 2014, when a series of violent events involving protesters, riot police, and unknown shooters in the capital, Kiev, culminated in the ousting of the democratically elected Ukrainian President, Viktor Yanukovych, and the overthrow of the Ukrainian Government.