If that is your problem - then perhaps employing some pastry chefs would help out there in the blancmange
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Side turret armour of a merk 4 is 35. The Egyptian 120mm weapon #103 will pass through that regularly to 4500 metres. The M60 TTs with weapon #105 will perforate that at 1900m. Both can dice up better result (and both can bounce, or you may be attacking off 0 degrees axis to the target)
So flank and rear shots is the thing. Adopt a "U" shaped ambush if he is coming at you. Hide behind any terrain and fire as they go by. OK tactic, so long as you are not the advancer..
Otherwise, just drop shed loads of arty on them, or where the seem to be firing from. Arty can break tracks, and an immobilised merkava is 600-700 points stuck in the wrong place. As Don said - dust them down with your cluster rockets (MLRS, Saqr-CM). Any on-map ones with access to armoured resupply can play shoot and scoot. Off-map ones should probably unload as fast as possible to avoid counter battery fires. Your arty and mortars are your primary delouser for Israeli infantry too.
If you're Jordan - simply use some javelin and TOW-2B T-A ATGMs... The Al-Hussein III can penetrate Merk 4b frontally to 1000m (best to 1600m but I would not bet the farm on it). So greeting them with a reverse slope ambush (with views to the flank for side kills to 5000m) should work.
If you are Syria, then go large on kornet teams (120 HEAT pen) and RPG-29 users, and advance as an infantry mob behind a storm of arty + mortars. And buy uragans. Any tanks etc to hide in the rear till needed to sweep up APC and wrecked merkavas in the end game.
Remember that tank turrets often turn to face the enemy - so firing something from the North may make him point there, so your units down to the South get to see his turret side. If the shot from the South makes the turret turn to face there, then the North firing group should get an exposure of his side. Keep pinging shots from the opposite angles and jumping back to the ones that get an exposed side.
Alternatively, for Israel's neighbours, use the Chinese strategy.
Merkavas cost the same as probably 2 rifle companies.
Israeli APC are rather expensive and have no cannons.
So buy a force based on 4-8 leg rifle companies (get any elites you can for better morale), many mortars and arty, plenty of inf-at teams + a few inf-SAM. Then walk forwards behind a barrage of HE, swarming over any tanks and APC - the HE will immobilise some, and duff his grunts up. The more super-expensive tanks he buys, the less infantry he gets, and you have not given those any targets by
not investing in tanks of your own. Only buy a few APC-killer light vehicles (like a platoon) which hide deep in the rear till needed to off any surviving Israeli APCs (e. Pt-76, BMP-2 or Fahd 240-30 with plenty of 30mm AP). If he buys merks, you probably only have to deal with 4 or so, plus loose change, then.
Andy