[Pontiac]

You shall not make for yourself an idol, whether in the form of anything that is in heaven above, or that is on the earth beneath, or that is in the water under the earth. You shall not bow down to them or worship them; for I the Lord your God am a jealous God, punishing children for the iniquity of parents, to the third and the fourth generation of those who reject me, but showing steadfast love to the thousandth generation of those who love me and keep my commandments.

I think that this, the First Commandment, should be enough explanation as to why this instruction to a priest is wrong.

Bishops should know better.

Allah is a false god and a Catholic priest should never step foot in a mosque.

To step inside a mosque is a mortal sin, to participate in muslim worship is even worse if that is possible.

Allah is a demon. Catholics to not even pretend to worship demons.

[ebb tide]

Allah is a demon. Catholics (d)o not even pretend to worship demons.

It was modernist bishops who authored Lumen Gentium:

In the first place amongst these there are the Muslims, who, professing to hold the faith of Abraham, along with us adore the one and merciful God, who on the last day will judge mankind.