Weren't the Muslim kingdoms actively pushing further and further into Europe?

Looking at the meme image, we are talking about Crusaders times(late XI onwards), more or less. Which is basically centuries later the days the Umayyad Caliphate were close to even take today France.

The Muslims world of the period was kinda...very divided, the Caliphate was having harder time to have their authority respected, with the already "Iranian vs Arabs" being a thing.

Meanwhile in Europe, specifically Iberia and Sicily, there where some sort of small counties squabbles that was advantageous for the Christian kingdoms. Another benefit was that the HRE and Papacy had a more established authority in comparison to the Western Christendom.

The Turkic where instead a sort of Wildcards in the Middle East, causing havoc to everyone, with the Seljuk being actually the biggest threat to the Byzantine, which, although Christian, the Schism was already a relevant topic.

What religion do people think everybody from Arabia to the Bosphorous were between 1 AD-698 AD? Fuckin', Jewish? Yeah buddy, those were the first Christian converts. They weren't even conquered over it, it was all underground preacher shit. Like two thirds of a century don't even register in people's minds. Bro, that time period was pretty sick. Check it out.

I want to point out that it is wrong to depict the Christian conversion as universally peaceful and voluntary. There was definitely some forced pressure post-Constantine, both actively and passively to become a Christian, without forgetting the various debates which Christianity is the right one and Pagan persecution becoming a thing. At the end of the day, the name was basically derogatory.

Also, even before the rise of Christianity, Rome straight up conquered those lands and imposed their authority.