1) Because Islam is a gutter religion which prides itself in lying to infidels taqiyya.
2) Islam does not respect the beliefs, customs, or laws of any non-muslim society.
3) Muslims are hypocrites.
And unfortunately, they are engaged in a 1500 year-old conquest of the world. If they cannot overpower a population, they subvert it.
And, as mentioned, we have one in the White House.