There are no extremist ideologies in KSA nor in Islam. I don't know about arms purchase, but if that's the case it should be take positively.
If we don't sell india will sell. there are many examples form past.
There used to be a madrassa school near our house, and kids were perfectly normal, used to play cricket together... we were too good for them
In 80's it used to be Indian agents making explosions not madrassa kids... and we use to read it news papers.
In any case, after soviet war we had lot of time and regimes to fix the madrassa, if there was any thing wrong.
Last but not least, KSA never run any pathetic project any where in world, leave aside those madrassa in Pakistan.
and i know you have no proof, but since last 5 years, your are being fed such baseless lies.