#ummar, Idol worshiping is forbidden in Islam, to support it or fecilitate it by any of the way is forbidden or it is like supporting idolatery,,, Regarding your examples, prayer by Khalifa Umer or any muslim , at any place of clean is allowed , if there is no any idolatery supported images or any articles....and same way in islam , it is forbidden to harm any non muslim worshiping places...as mentioned by your second example...
#ummar,
Idol worshiping is forbidden in Islam, to support it or fecilitate it by any of the way is forbidden or it is like supporting idolatery,,,
Regarding your examples, prayer by Khalifa Umer or any muslim , at any place of clean is allowed , if there is no any idolatery supported images or any articles....and same way in islam , it is forbidden to harm any non muslim worshiping places...as mentioned by your second example...