I see a lot of arguments about a non-issue. The fact that APJ Abdul Kalam is a Muslim, is well and good, he is our fellow Muslim brother. But he is also a citizen of India and a former President of India. So as a loyal citizen, he is supposed to do his duty for his nation, which he does apparently and Indians like him for that reason. And India being a majority Hindu nation, he will be working for and protecting his nations interest, regardless of the religious demographics of his nation. If he does not, he is no longer a loyal citizen of that nation. So in effect it will seem like that he is working for Hindu interest against Muslim interest. The confusion here is that there is no Hindu interest or Muslim interest, there is only Indian interest, which just happens to be majority Hindu, but also has many Muslims, who are more in number than Bangladesh or even Pakistan.
We should show him due respect as a distinguished person from a neighbor nation, and he is welcome as a guest. We should not feel that he is betraying Muslim interest, he is just being a loyal citizen, doing his part for his country and nation.
We also have 8-9% Hindu in our country and most I am sure are working for Bangladesh interest, and they ideally should not be working for Hindu interest to help India, those who do are betraying their motherland and nation.
All of us need to get out of this Hindu, Muslim paradigm and mindset based just on religion. A country is like an army or a corporation and citizens are its soldiers and share-holders, if you are not working for your country, then you are not doing your part. So the dilemma is that minorities sometimes will seem to work against the interest of their co-religionists. That is the root of this confusion among some people here.
Now that is the ideal situation, but the reality is of course not exactly like that. People who share religion, always share some level of empathy, some take it to unrealistic extreme like Hizb-ut-Tahrir, while others don't. And just because people share a religion, it is absurd to think that they will not fight among themselves when interests diverge. Europeans did throughout history, so did East Asians and South East Asians, even though they shared common religion. So let us not say that only Muslims do this fighting among themselves. Everyone does it, apparently.