Impatience, yes, intolerance, no: tolerance is a political value and right in the West.
A political religion founded by a warlord, Islam is by its very nature and history intolerant. One of its faithful has, on this Catholic site, proudly vaunted that by prophecy and in fact Islam is going to dominate the world.
The wisdom in seeing Islam as a threat is old; consider these words of genius by a great philosopher, David Hume:
“The admirers and follows of the ALCORAN insist on the excellent moral precepts interspersed throughout that wild and absurd performance. But it is to be supposed, that the ARABIC words, which correspond to the ENGLISH, equity, justice, temperance, meekness, charity, were such as, from the constant use of that tongue, must always be taken in a good sense; and it would have argued the greatest ignorance, not of morals, but of language, to have mentioned them with any epithets, besides those of applause and approbation. But would we know, whether the pretended prophet had really attained a just sentiment of morals? Let us attend to his narration; and we shall soon find, that he bestows praise on such instances of treachery, inhumanity, cruelty, revenge, bigotry, as are utterly incompatible with civilized society. No steady rule of right seems there to be attended to; and every action is blamed or praised, so far only as it is beneficial or hurtful to the true believers.”
For the hatred spewed by Muslims in Britain–where their numbers are legion–see the recent BBC 4 report on line: it is to make one weep.
Last, I would suggest that Muslims go on Catholic and Christian sites and that it is best to ignore them, as I know from hard experience.
I have canceled my membership in one such site because the Muslims and the Atheists prevented too much of an opportunity for sin, which we foreswear in our acts of contrition.
No, I am not saying whatever you say to them say nothing, but beware: they are here to stir things up, nothing more, nothing less, and living a Catholic life is hard enough without entertaining Satan in our homes.