VE,
Everything we all learn is something we have heard or read. So we need to be careful where wesorce our knowledge, and make sure it is reputable. The Saudi/Wahabbi/terrorism link is fairly well known and you can find many links to it by Googling.
Here is a link from the HuffPost which I accept as being fairly reputable (if you don’t like it, go find another one):
https://www.huffingtonpost.com/dr-yousaf-butt-/saudi-wahhabism-islam-terrorism_b_6501916.html
// The money goes to constructing and operating mosques and madrassas that preach radical Wahhabism. The money also goes to training imams; media outreach and publishing; distribution of Wahhabi textbooks, and endowments to universities and cultural centers. A cable released by Wikileaks explains, regarding just one region of Pakistan:
Government and non-governmental sources claimed that financial support estimated at nearly 100 million USD annually was making its way to Deobandi and Ahl-e-Hadith clerics in the region from “missionary” and “Islamic charitable” organizations in Saudi Arabia and the United Arab Emirates ostensibly with the direct support of those governments. //