Yes, FIQH-E-JAFARI allows Mut'a marriage. But it is not WAJIB that every Jafari Shia must do a Mut'a.
Kaukab Siddique's purpose in writing all this is basically to malign the Shi'a Fiqh and propagate hate among Muslims of various persuations.
Most of Sunni Islam accept the tripple TALAQ -- does that mean that unless and until A Sunni Muslim executes a tripple TALAQ he is not a complete Sunni Muslim?
The whole idea is preposterous and stupid. THere is no logic in it.
It is time that Muslims of all colours and kinds should come together and work for the solidarity of the Umma so that the onslaught of ISlamophobia can be countered effectively.
However, there are those like Kaukab who would want to spend their energies in hate-mongering propagating bigotry.
May Allah give him good sense.