it isn't bad enough in America for conservatives to do anything. We are extremely financially prosperous compared to the rest of the world. We are not stuck living in row houses next to invaders. Many of us have $80k trucks in our driveway, 3-bedroom homes in white suburbs, and big-tittied wives that aren't at risk of getting raped any time soon.
We have such an enormous amount of land here that we can live the European equivalent of three countries away from any significant invading Muslim population any time we want, and despite "America" being the overall theme of the conservative/MAGA movement that the rest of the world hears, we still primarily identify as tribal members of the particular area of whatever state we live in, and we spend more time and energy telling white and Jewish transplants from New York and California to get the fuck off out our towns than telling the Muslims invaders to get out of cities hundreds/thousands of miles away from where we actually live.
Most conservatives that do live in the big blue cities know they are on enemy territory and are there just for work or some other emotionally detached reason with no particular interest in fighting for the city anymore.
Since most conservatives don't actually encounter a significant Muslim population on a daily basis, their invasion is not an immediate threat and is not worth giving up our guns, trucks, homes, wives, and children to fight-- yet.