Jam?s in Spanish means "never". The word is generally attributed to '?rabe', but in Spain that means what people speak in Morocco, which Moroccans call Arabic, but isn't.
HAMAS (in Arabic, an acronym for "Harakat Al-Muqawama Al-Islamia" -- Islamic Resistance Movement -- and a word meaning zeal) is a radical Islamic fundamentalist organization which became active in the early stages of the intifada, operating primarily in the Gaza District but also in Judea and Samaria. Formed in late 1987 as an outgrowth of the Palestinian branch of the Muslim Brotherhood. Various HAMAS elements have used both political and violent means, including terrorism, to pursue the goal of establishing an Islamic Palestinian state in place of Israel. Loosely structured, with some elements working clandestinely and others working openly through mosques and social service institutions to recruit members, raise money, organize activities, and distribute propaganda. In a January 2006 election, Hamas won a majority of seats in the Palestinian legislature.
Hamas ( I think the stress is on the first syllable, not the last as in the Spanish word jam?s) is, as it says above, an acronym as well as a word for 'zeal'.
If we assume that Hamas is a noun, then 'Hamas ser? vencido' would mean Hamas will be conquered.
But that would sound pretty ambiguous to any Spanish-speaker.
I think the Israelis originally and surrepticiously cultivated Hamas as an alternative to the PLO a long time ago. Talk about 'blowback'.