It is clear to me that the real meaning of "tolerance" has been lost to an entire generation. Tolerance does not mean agreement, it in fact means disagreement with something (a point of view, a lifestyle, etc.), but allowing it to exist anyway. As in not trying to persecute or imprison people holding that view.
The Latin word 'tolerare' that we derived the word tolerate from meant "to bear, to endure (often associated with pain)". So, to say that you will only tolerate something that you find somewhat agreeable or rational is an oxymoron.
So, when many people use the word "tolerance" what they really mean is "agreement with". In which case, you find most people to be intolerant of many things.