All most of can do for Germany and other European countries with so much trouble is pray for them. For ourselves, we can stay always on the Lord's side. The United States is moving too fast in the same direction as Europe. The answer really is found in this OT verse:
"If my people, which are called by my name, shall humble themselves, and pray, and seek my face, and turn from their wicked ways; then will I hear from heaven, and will forgive their sin, and will heal their land." II Chron 7:14
Unfortunately, the answer I see that too many will likely try to take, if their governments are unable or unwilling to not solve the problem, is to lash out with the weapons at hands [guns and the like] against whoever they see to be the enemy taking the law into their own hands. This will not solve the problem, but bring chaos and anarchy into play. Governments may well then impose martial law but martial law with either liberals or conservatives or some combination thereof in power will also not be a solution. Only God can fix it, but how many will really ask Him to do it?
But... in the United States [and apparently in other countries] people have brought it upon themselves. The solution is as per II Chron 7:14, but who will take it seriously while they still can? We can! But are we enough? In Sodom and Gomorrah, it would only taken 10 and there were too few and they were destroyed. How many would God require here to stop or delay whatever terrible things people are likely to face here?
Let us pray!