I personally dont think this is far fetched. There seems to have been a cover up about his death. The alleged shooter was maga. Kirk was going against Israel, and could have been a significant problem and priority target for israel, but for anyone else, he was just a racist POS, and very low significance, if someone wished to assassinate with goals of slowing maga down.

However, he was probably quite relevant for young people, so I could see it going either way, but I dont find the theory Israel was responsible is too much of a stretch, and it appears powerful people didnt want the public to learn too much about it.