Why is the people of Bengal get arrested?

In India West Bengal is a state which is situated near the Bihar and Bangladesh.
IIn India general election hass finished,the wining party is BJP which is leaded 
by the world most popular person MR.NARENDRA DAMODARDAS MODI.Who is elected as 
the PM of INDIA.During the election campaign in bengal the CM MAMTA BENERGEE,
get disappointed a word "JAI SHREE RAM" she argues to people to not speak this word,
but this word is a name of Hindu god RAM .Thus people not listening to her .
She given the order to Bengal police to get arrests those who used to speak "Jai Shree RAM,
"
is this a right rule of Bengal CM or nOt comment please?
Because INDIA is a democratic country ,here every one have right to speak,?