Just to add a little to explain the points in your question:
- what the "unfriendly acts" were:
In March it seems he seized a Dutch vessel carrying official
correspondence from the Governor of Curacoa to the dependent island of
Aruba. Intercepted the correspondence and imprisoned the crew and now
he has handed his passports to M. de Reus the Dutch representative in
Venezuela on the grounds that he is unfriendly medium!
The above from issue 67 of The Economist, published in July 1908.(emphasis mine)
This is also mentioned in the Book Gunboats, Corruption, and Claims: Foreign Intervention in Venezuela, 1899-1908
By Brian Stuart McBeth
Venezuelan gunboats continuously siezed many small craft that flew the
Dutch flag, while many sailors from Curacao, just offshore from
Venezuela, had been detained in mainland prisons.
- Concerning the Jewish refugees:
This conflict really started earlier, with the 1908 actions just really being the culmination. In 1902 the Jewish community in Curo, Venezuela requested aid from the Dutch government, since many had originally come from Curacoa:
Another outbreak against foreigners in June 1902 compelled the Jews
again to seek an asylum in Curacao tendered to them by the governor of
the island Jhr J 0 de Jong van Beck en Doom who upon learning the
facts dispntched the Dutch man of war Koningin Regentesse to protect
them. It returned to Curacao with eighty Jewish women and children on
board In July following the same vessel was sent to La Vela de Core
for the remainder and only a few Jewish residents remained
(from The Jewish Encyclopedia: A Descriptive Record of the History ..., Volume 4
edited by Isidore Singer, Cyrus Adler dated 1903)
More information on the Jewish settlement can be found in The Jews of Coro, Venezuela, by Isaac Samuel Emmanuel
I find no justification for the wikipedia reference to the refugees being the cause of the conflict, however.
Plenty of references exist from the time of these events, and most of the conflict seems to be based around corporate and national interests supporting various opponents of Cipriano Castro.