Israel denies visa for talk on decolonisation exposing Einstein

The Palestine Technical University, Kadourie, Palestine, is organizing the Sixth Palestinian Conference on Modern Trends in Mathematics and Physics PCMTMP-VI, 5th-8th August 2018.
I was invited to give two plenary talks (scheduled on 7th and 8th Aug) on
Decolonising mathematics: how and why it makes science better (and enables students to solve harder problems)
An extended summary and abstract of my proposed talk are posted online.
The Israeli embassy has, however, refused me a visa. No official reason or explanation was offered for the denial of visa. When I asked, an official from the Israeli embassy did very rudely warn me not to apply ever again for an Israeli visa.
Now five years ago, I visited Palestine (See blog post “Mathematics in refugee camps”, and a nice video on History and Philosophy of science). Of course, I did have a terrible experience with the Israelis: they charged me some USD 200 for a taxi for 8.5 km, then put me on a share taxi and promised to give the receipt after I crossed the border! Never encountered such terrible cheats anywhere else in the world. But last time the Israeli embassy in India had issued me a visa.
So, I am left wondering what has changed. Three things have changed. 1. Decolonisation, 2. Einstein, and 3. Indo-Israeli relationship
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