Not while remaining faithful to their religion. A core tenant of all three faiths you named is that their God (which are all different interpretations of the same god) is the ONLY god and you cannot recognize any other god.
Of course, there have always been varying interpretations of each faith. Christianity, especially, has lent itself to syncretism quite well. There have been (and still are) many cultures where the people would identify themselves as Christian, but see no contradiction in also recognizing aspects of other faiths, including sometimes gods (although they might call them some other word).
If you’re following any of the major, world-recognized denominations of Christianity, Judaism, or Islam (eg Catholicism, Protestantism, Sunni Islam, Orthodox Judaism, Shia Islam, etc) then, no, you cannot worship pagan gods. But there are smaller versions of each religion which do.
Not while remaining faithful to their religion. A core tenant of all three faiths you named is that their God (which are all different interpretations of the same god) is the ONLY god and you cannot recognize any other god.
Of course, there have always been varying interpretations of each faith. Christianity, especially, has lent itself to syncretism quite well. There have been (and still are) many cultures where the people would identify themselves as Christian, but see no contradiction in also recognizing aspects of other faiths, including sometimes gods (although they might call them some other word).
If you’re following any of the major, world-recognized denominations of Christianity, Judaism, or Islam (eg Catholicism, Protestantism, Sunni Islam, Orthodox Judaism, Shia Islam, etc) then, no, you cannot worship pagan gods. But there are smaller versions of each religion which do.