"A man sometimes starts up a patriot, only by disseminating discontent, and propagating reports of secret influence, of dangerous counsels, of violated rights, and encroaching usurpation. This practice is no certain note of patriotism. To instigate the populace with rage beyond the provocation, is to suspend public happiness, if not to destroy it. He is no lover of his country, that unnecessarily disturbs its peace. Few errors and few faults of government, can justify an appeal to the rabble; who ought not to judge of what they cannot understand, and whose opinions are not propagated by reason, but caught by contagion."
... quite. ie. Don't incite the mob by spreading alarmist falsehoods eg. to denigrate minorities - Germany 1930s, Britain/USA 2016.
"It is the quality of patriotism to be jealous and watchful, to observe all secret machinations, and to see public dangers at a distance. The true lover of his country is ready to communicate his fears, and to sound the alarm, whenever he perceives the approach of mischief. But he sounds no alarm, when there is no enemy; he never terrifies his countrymen till he is terrified himself. The patriotism, therefore, may be justly doubted of him, who professes to be disturbed by incredibilities..."
... does that sound a little like "70 million Turks planning to head to Britain"?
"Let us take a patriot, where we can meet him; and, that we may not flatter ourselves by false appearances, distinguish those marks which are certain, from those which may deceive; for a man may have the external appearance of a patriot, without the constituent qualities; as false coins have often lustre, though they want weight."
... could be either of Farage and Trump.
And finally, as (mis-)quoted by Bob Dylan in "Sweetheart Like You" - "Patriotism is the last refuge to which a scoundrel clings."