Any conversion to Islam is null and void if it is for any ulterior motive :  sheer mischief /fitna unless it is solely out of conviction borne out of knowledge about the religion  and unshakeable faith in one God and the last prophet.The constitution may permit it,but inter religion marriages are neither desirable nor practical.Love,even psychology concedes is an aberration of mind. Ghalib  said so a hundred years ago. " kehte hain jisko ishiq ,khalal hai dimag ka." Callow ,immature minds, illiterate,Hindi film struck ,idiots resort to such antics.