Worship of any form of statues, murtis, pictures is sin in islam and there is no pardon for that. It is the highest form of sin in Islam, Allah tells he can forgive everything except shirk. So when your non-muslim husband/wife is doing shirk in front of Ram or Krishna, it is obligation of muslim spouse to stop him/her from doing this, else you will be part of shirk, now if you stop them from doing puja to their pictures of god,statues, then there will no equality.
Worship of any form of statues, murtis, pictures is sin in islam and there is no pardon for that. It is the highest form of sin in Islam, Allah tells he can forgive everything except shirk. So when your non-muslim husband/wife is doing shirk in front of Ram or Krishna, it is obligation of muslim spouse to stop him/her from doing this, else you will be part of shirk, now if you stop them from doing puja to their pictures of god,statues, then there will no equality.