Little of both. There is not a hidden agenda. There are vocal segments of Islam about their desire to maintain Islamism and spread it to other countries.

For others it's not so much an agenda to install Islam as a natural inclination to push for laws and accommodations in line with their religious beliefs.

I mean look at the constant criticism of Christians, claiming they seek to install a theocracy. Do they realllly? No, the vast majority do not.

There is that double standard in criticism of Christians vs Muslims.

Some are overheated in their criticism, believing there is only a hardline agenda and that we are in existential war and must throw the Muslims out to protect ourselves.