83 percent of Palestinians and 62 percent of Jordanians approve of attacks on Americans...
I take it you didn't actually look at the underlying data for this clear cherry picking and outright subterfuge of the facts by this wacky website.
As you can clearly see, "vast numbers" do not "support terrorism". They actually feel just the opposite in regard to attacking civilians. But they do agree with the al Qaida that US servicemen do not belong in the Middle East. That those American troops fighting in Iraq and Afghanistan to subjugate Muslims in their own countries are considered to be fair game by many Muslims in other countries.
Furthermore, they think we are trying to expand Israel, control their oil, extremely disapprove of the American government, and think that the US is disrespectful towards Islam (many even think we are intentionally trying to humiliate them) while attempting to spread Christianity in their countries:
http://www.worldpublicopinion.org/pipa/pdf/feb09/STARTII_Feb09_rpt.pdf
Attacks on civilians in the US (approve/mixed feelings/disapprove):
Egypt: 8/2/84
Indonesia: 5/8/73
Pakistan: 9/15/55
Morocco: 7/8/78
Palestine: 24/15/59
Jordan: 11/12/68
Turkey: 8/10/74
Azerbaijan: 4/10/81
View of al-Qaida: (support attacks on Americans/oppose attacks but share attitudes/oppose do not share/don't know):
Egypt: 21/22/28/18
Indonesia: 9/19/22/51
Pakistan: 16/15/22/47
Morocco: 8/31/26/35
Al Qaida goal: Get US to withdraw forces from Islamic Countries. (Percent who agree):
Egypt 87%
Indonesia 65%
Pakistan 62%
Morocco 72%
US Naval Bases in Persian Gulf (Percent who agree):
Egypt: 1%
Indonesia: 5%
Pakistan: 1%
Palestine: 4%
Turkey: 6%
Jordan: 11%
Effect of Withdrawl from Iraq: Would al Qaida attacks increase/stay the same/decrease?
Egypt: 5/14/78
Indonesia: 2/10/37
Palestine: 14/34/46
Jordan: 13/19/46
Turkey: 11/20/43
Azerbaijan: 8/36/46
Attacks on US troops in Iraq :
Egypt: 83/1/10
Indonesia: 26/15/42
Pakistan: 26/22/32
Morocco: 68/11/14
Palestine: 90/4/5
Jordan: 72/7/12
Turkey: 40/12/39
Azerbaijan: 9/11/76
Attacks on US troops in Afghanstan:
Egypt: 83/1/8
Indonesia: 22/17/42
Pakistan: 29/18/32
Morocco: 61/14/17
US Goal: Weaken and divide Islam?
Egypt: 87/3
Indonesia: 62/13
Pakistan: 74/9
Morocco: 78/11
Palestine: 87/11
Jordan: 80/12
Turkey: 82/9
Azerbaijan: 65/20
US Goal: Spread Christianity?
Indonesia: 52/24
Pakistan: 71/11
Morocco: 67/22
Palestine: 88/11
Jordan: 71/17
Turkey: 79/11
Azerbaijan: 60/11
US Goal: Maintain control over oil?
Egypt: 88/3
Indonesia: 67/12
Pakistan: 62/8
Morocco:82/10
Palestine: 89/10
Jordan: 87/3
Azerbaijan: 90/5
US Goal: Expanding Israeli Borders?
Egypt: 86/5
Indonesia: 47/22
Pakistan: 52/6
Morocco: 64/23
Palestine: 90/9
Jordan: 84/6
Turkey: 78/8
Azerbaijan: 43/42
US Goal: Creation of a Palestinian state?
Egypt: 4/87
Indonesia: 24/48
Pakistan: 36/22
Morocco: 23/64
Palestine: 59/37
Jordan: 28/63
Turkey: 33/52
Azerbaijan: 7/79
Views of Current US Government:
Egypt: 4/89
Indonesia: 18/64
Pakistan: 17/56
Morocco: 16/76
Iran: 8/85
US Relations with Muslim World (respectful/disrespectful/tries to humiliate):
Egypt: 11/24/56
Indonesia: 8/39/30
Pakistan: 6/22/52
Nigerian Muslims: 23/41/28
Palestine: 20/28/49
Jordan: 16/34/39
Turkey:8/40/43
Azerbaijan: 12/47/37
Iran: 5/21/64
Hardly any problem is 100% insular. But denying that the doctrine of Jihad is and has always been an integral part of Islam is to ignore Islamic scripture as well as most parts of Islamic history. And the reason most terror attacks are directed at other Muslims has to do entirely with competing religious views and different interpretations of the holy texts.
You mean according to most any Islamophobic "scholar" like Geert Wilders?
The current "doctrine" of Islam is peaceful, especially towards civilians. What do you think the "doctrine" of the Old Testament is?