You are wrong. Tanks were used. From Wiki:
Brigadier Diwan reported heavy casualties and requested more reinforcements. General Brar sent two companies of 15 Kumaon Regiment. This resulted in yet more heavy casualties, forcing Brigadier Diwan to request tank support. Brar also requested tank support after an APC was destroyed by a rocket fired by a Sikh militant. His request was granted and seven tanks rolled into the Golden Temple complex.
By 05h00 June 6, due to the 105mm shelling by Vijayanta the Akal Takhat was destroyed. However, the primary objective of removing militants from other neighbouring structures continued for a further 24 hours.
And the man who ran the operation talks about the need of using tanks in his interviews.
Here is a pic:
Here is the Indian Hero who successfully desecrated Golden temple:
(I heard some Sikhs attacked him recently in London)
Another Picture. Army is in the premises with their shoes ON and you can see 4 tanks in the back ground:
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Don't lie now KS jee, Indian troops not Pakistani
.