Who is “they?” We have two parties to a perfectly legal contract a willing seller and a willing buyer. Since you don’t believe in property rights (at least for people you dislike), perhaps you would feel more comfortable living in North Korea of Venzuela there. There are plenty of folk there would who agree with you.
Mosques - like everyone built in the west is fully funded by Saudi Arabia.
so why don’t we let the saudis fund another imam and buy the capitol, white house, pentagon and the lincoln memorial and build mosques there as well??