It's the people who give powers of regulation to the government and, unfortunately, those people too often outsource their own moral judgement to the law.

Yes. Discrimination is normal, and thanks to God for it.

I agree with the conclusions of this article.

However, like in the author's previous article, the principles upon which these conclusions are made are lacking: the "why"s are either not provided, or are nonsensical. Just an "I want it to be like this" is not a very convincing argument.

Let us have a closer look at the author's statement:
"Governments exist to protect life, liberty, and property, not to safeguard feelings or to police attitudes."

Is that really so?
Do governments even exist for a purpose, let alone a valid purpose?
Or did they just happened to be?

So what if the author would like governments to protect life, liberty and property, but not feelings? These are HIS preferences, while other people have different ones.

I believe that governments just evolved into what they are now, without any fundamental guiding principles, so this assignment of purpose to governments is only made after the fact, by both the author and others in accordance to their respective wishful thinking.

In Hinduism, discrimination ("Viveka" in Sanskrit) is considered a precious cornerstone for all spiritual progress, with emphasis on two forms:
1) Discriminating between Right and Wrong.
2) Discriminating between Truth and Untruth.

The subsequent spiritual cornerstone following discrimination ("Viveka") is "Vairagya", loosely translated as "dispassion" or "non-attachment": http://www.youtube.com/watch?v=W06YLVJyCmM

Once being able to tell the difference (i.e. discriminate) between right and wrong, one can gradually attain the necessary dispassion to abandon the wrong ways and follow the right ways, but if one is not even allowed to experiment and exercise their power of choice, then they will not be able to progress spiritually and attain Vairagya. Their outwardly actions might imitate Vairagya as per the state's laws, but they would not even obtain the prerequisite of Viveka.

Now this in brief is a fundamental "why", why governments ought not prohibit discrimination by individuals. This is not whim-based, this is based on 1000's of years old spiritual science, with plenty of resources available both on and off line.