Tolerance, now a days is a really hard thing to find. People don't seem to tolerate the existence of other people. Especially people don't tolerate other's beliefs. We have no right to kill someone if they believe in a particular religion, what harm does it to you? Everyone should have a right to live their life peacefully and freely.
In the days of technological advances and high job demands make people less time to socialize with people around him, thus someone else less concerned with others. The tolerance of others is less because they are busy with their work.