The leftists lead by Merkel and Macron had decided that the EU should open its borders to refugees...

Rights and responsibilities of parties to the Refugee Convention

In the general principle of international law, treaties in force are binding upon the parties to it and must be performed in good faith. Countries that have ratified the Refugee Convention are obliged to protect refugees that are on their territory, in accordance with its terms. There are a number of provisions that States parties to the Refugee Convention must adhere to.

Refugees shall
    abide by the national laws of the contracting states (Article 2)

The contracting states shall
    exempt refugees from reciprocity (Article 7): That means that the granting of a right to a refugee should not be subject to the granting of similar treatment by the refugee's country of nationality, because refugees do not enjoy the protection of their home state.
    be able to take provisional measures against a refugee if needed in the interest of essential national security (Article 9)
    respect a refugee's personal status and the rights that come with it, particularly rights related to marriage (Article 12)
    provide free access to courts for refugees (Article 16)
    provide administrative assistance for refugees (Article 25)
    provide identity papers for refugees (Article 27)
    provide travel documents for refugees (Article 28)
    allow refugees to transfer their assets (Article 30)
    provide the possibility of assimilation and naturalization to refugees (Article 34)
    cooperate with the UNHCR (Article 35) in the exercise of its functions and to help UNHCR supervise the implementation of the provisions in the Convention.
    provide information on any national legislation they may adopt to ensure the application of the Convention (Article 36).
    settle disputes they may have with other contracting states at the International Court of Justice if not otherwise possible (Article 38)

The contracting states shall not
    discriminate against refugees (Article 3)
    take exceptional measures against a refugee solely on account of his or her nationality (Article 8}
    expect refugees to pay taxes and fiscal charges that are different to those of nationals (Article 29)
    impose penalties on refugees who entered illegally in search of asylum if they present themselves without delay (Article 31), which is commonly interpreted to mean that their unlawful entry and presence ought not to be prosecuted at all
    expel refugees (Article 32)
    forcibly return or "refoul" refugees to the country they've fled from (Article 33). It is widely accepted that the prohibition of forcible return is part of customary international law. This means that even States that are not party to the 1951 Refugee Convention must respect the principle of non-refoulement. Therefore, States are obligated under the Convention and under customary international law to respect the principle of non-refoulement. If and when this principle is threatened, UNHCR can respond by intervening with relevant authorities, and if it deems necessary, will inform the public

Refugees shall be treated at least like nationals in relation to
    freedom to practice their religion (Article 4)
    the respect and protection of artistic rights and industrial property (Article 14)
    rationing (Article 20)
    elementary education (Article 22)
    public relief and assistance (Article 23)
    labour legislation and social security (Article 24)

Refugees shall be treated at least like other non-nationals in relation to
    movable and immovable property (Article 13)
    the right of association in unions or other associations (Article 15)
    wage-earning employment (Article 17)
    self-employment (Article 18)
    practice of the liberal professions (Article 19)
    housing (Article 21)
    education higher than elementary (Article 22)
    the right to free movement and free choice of residence within the country (Article 26)