First of all it is fornication and a crime against God.
If they commit this crime now with a Muslim or with someone else is secondary. If they join now in addition some wicked heresies like hating Jews and Israel i.e. they add.
But this people simply don't care. Of cause there will come no good outh of this.
This is not important for them. They learn this in school. All the consequences the taxpayer has to pay for. It is a social state. Even it gets advertised by the gouvernment TV (KiKa is a part of the gouvernment
https://en.wikipedia.org/wiki/KiKa )
Imo the day will come soon were all this people who are enemies of God with their false religions of Atheism, Climate Change, Gender, Multi Kuluralism, Enviromentalism and so on will get their bill. And I am shure God will protect in this time those who were loyal to Him.