https://en.wikipedia.org/wiki/Flag_desecration

It looks like most countries in mainland Europe either restrict flag desecration in general or desecration of their national flag.

Of the mainland Europe countries for which data exists, Norway, Sweden, Belgium, and Romania permit it, and Denmark prohibits desecration of international flags but permits desecration of the national flag.

It looks like the British tradition is to permit it -- the UK, Ireland, Australia, the US, and Canada permit it (though New Zealand does not).

It looks like most countries around the world prohibit desecration of their own flag but permit desecration of those of others.

The only other countries that take the Danish approach (permit desecration of own but not of others) are Uruguay and Japan.

It looks like Europe is actually one of the most-restrictive places in the world in terms of flag desecration. Few countries around the world restrict both desecration of one's own flag and the flag of other countries; almost all are in Europe, with only Israel and South Korea doing the same outside of Europe.

You dont need to burn a Quran to condem Islam

No, but you certainly can choose that as your form of expression.

What would you say if people flock to burn Torahs instead?

That's fine too.