"When you're in a Muslim country, you should adapt your behaviour to accommodate Muslim sensibilities. And when Muslims are in a non-Muslim country, non-Muslims should adapt their behaviour to accommodate Muslim sensibilities...
Got it?"

- Robert Spencer

Wearing a Muslim-style headscarf

"...make war on the leaders of unbelief...Make war on them: God will chastise them at your hands and humble them. He will grant you victory over them..." (Surah 9:12-)

"It ill becomes the idolaters [non-Muslims] to visit the mosques of God..." (Surah 9:17)

"Believers, take neither Jews nor Christians for your friends." (Surah 5:51)

"Fight against such as those to whom the Scriptures were given [Jews and Christians]...until they pay tribute out of hand and are utterly subdued." (Surah 9:27-)

"Prophet make war on the unbelievers and the hypocrites and deal rigorously with them. Hell shall be their home." (Surah 9:73)

"Believers, make war on the infidels who dwell around you. Deal firmly with them." (Surah 9:121-)

Regarding infidels (unbelievers), they are the Muslim's "inveterate enemies" (Sura 4:101). Muslims are to "arrest them, besiege them and lie in ambush everywhere" (Sura 9:5) for them. They are to "seize them and put them to death wherever you find them, kill them wherever you find them"