It is a horrible feeling to come into confrontation with fundamentalist lunatics like that Eliza, but I cannot help but ask, have you never bumped into the Christian equivalent with exactly the same attitude to your husband?
If not, you have been lucky indeed, for they are just as numerous, and just as nasty.
Fundamentalists, of whatever stamp, are the problem here. When religion becomes more important than humanity, it no longer encompasses moral and ethical values.
In my opinion, the Bangladeshis of whom you speak, if they are not naturalised, or British born, should be offered two choices. Give up the race hate speech, or leave.
It is a great pity that we don't have that remedy for our home grown fundies.