Poles worry about the "brexit" demonstration to support the EU. Where did the storm start?

Original title: poles worry about the "brexit" demonstration to support the EU. Where did the storm start?
Beijing, Oct. 12 (Xinhua) according to foreign media reports, more than 100 towns in Poland held anti brexit demonstrations on the 10th, with about 100000 people participating in the capital Warsaw alone.
Where do the concerns about Poland's possible brexit come from? According to the Chinese network of the BBC, Polish Prime Minister morawitsky's challenge to a core legal principle of the EU has intensified the confrontation between Poland and the EU and raised concerns.
Why worry about Poland leaving Europe?
On October 7, the Polish constitutional court ruled that the important provisions of the EU basic treaty were inconsistent with the Polish constitution, which was tantamount to rejecting the principle that EU laws were superior to the laws of Member States, which shook Poland's membership in the EU.
The European Commission said that the ruling caused "serious concern". The statement of the European Commission said that "EU laws override the laws of Member States, including constitutional provisions."
"All decisions of the European Court of justice must be observed by all member governments, including the courts of Member States."
The European Commission also warned that it would use all the powers conferred by the EU treaty to safeguard the integrated application and integrity of EU law.
What are Poland and the EU arguing about?
The legal battle between Poland and the European Union was first put forward by Polish Prime Minister morawitsky. This is the first time that leaders of EU member states have challenged the EU treaty in their constitutional court.
Morawitsky challenged EU law because the European Court of justice previously ruled that the judge selection system introduced by the Polish coalition government in 2018 violated EU law.
The Polish coalition government implemented judicial reform to prevent Polish judges from invoking EU laws to question the appointment of judges, while the European Commission and other international judicial organizations criticized the Polish government's reform as endangering judicial independence.
Earlier, France said that Poland's brexit has now become a "real risk". The foreign ministers of France and Germany condemned Poland and said that EU membership is based on "full and unconditional compliance with common values and norms", and this "is not only a moral commitment, but also a commitment that must be observed according to law."
Which side are the poles on?
Opinion polls in Poland have always shown that Polish voters strongly support EU membership. The ruling of Poland's Constitutional Court triggered large-scale mass demonstrations.
Worried about Poland's secession from the EU, poles supporting EU membership launched demonstrations and rallies in about 100 towns across the country against Poland's secession. In the capital Warsaw, about 100000 people took to the streets.
Tusk, former president of the European Commission and the leader of the opposition Civic Platform, called on people to defend "Poland belonging to Europe" at a rally in Warsaw.
However, Polish Prime Minister morawitsky said that the ruling Legal Justice Party (PIs) has no plan to leave the EU. He defended the ruling of the constitutional court and said that leaving the EU was "false news" made by the opposition trying to discredit the government.
What other factors may be behind it?
BBC analysis said that the legal war between Poland and the EU still has a big background. The EU has not approved a recovery plan for Poland of up to 57 billion euros. The parties are still negotiating on this plan. The European Commission said that Poland's legal challenge to the EU delayed the adoption of the plan.
If the Polish government tries to use the court ruling to force the EU to pass a large amount of money, it faces a high risk. The European Commission has made it clear that it will resort to legal action to resolve disputes and even delay EU funds.
The Polish constitutional court is now dominated by judges who support the ruling Legal Justice Party (PIs), some of whom were members of the party.