First of all, it is FALSE that Allah is the general word for God in Arabic. It is NOT the generic word for deity. It is a proper name and always was.
And if that implies that millions of people are wrong, then let the chips fall where they may.
Allah is a word much like BAAL. It could be argued that BAAL is just the general word for the Lord. That is the same argument that was used to call IHVH BAAL when the northern kingdoms went astray at Bethel. That is the EXACT kind of syncretism that did it.
IHVH was the same as the ADONAI was the same as BAAL. They were all blended, all syncretised and thus BAAL worship slowly replaced IHVH worship while even being done in the name of IHVH.
It is the same with Allah. Allah is known to be the name of the Meccan moon idol. That is where Mohammed got it. It was a jinn demonic sorcerer and used Allah moon magic. It was his specific aim to syncretise the Bible with Meccan moon paganism all under the banner of Allah. This is exactly what has always happened in syncretism.
Furthermore, the general word for godhead, divinity, and deity in Arabic is ألوهية, not Allah.
And if that disturbs people, they are just going to have to be disturbed. Christianity has nothing to do with respecting anyone's cultural or linguistic heritage, it has everything to do with turning the world upside down and transforming it.