Syncretism is very dangerous.
I remember a Muslim going around my workplace a couple of years ago trying to convert weak Christians by telling them that Muslims loved Jesus too. It was deceptive and sneaky and I was the only one who really stood up to him at the time and called him out on his BS.
I could have gotten into trouble for that but I didn't thankfully.
The vast majority of people don't know much of anything about Islam so they don't understand why people like me and JTFers are so strongly against it and they just think we're being mean.
After all according to the left wingers, Muslims are peaceful people who contributed a lot to the USA who we should be grateful to, and oh they love Jesus too.
If all someone ever consumes is left wing media and no alternative or right wing media, that's the only narrative they'll ever really hear about them. After all when a Muslim commits a terrorist act, it's the gun's fault.